South Korea Patent Translation Deadline and Trademark Filing Order

The South Korea patent translation deadline depends on the filing route. The difficult question is not simply where to order a certified translation. You must first determine whether Korean text is required at the initial filing, whether a Korean translation may follow later, which version must be translated, and whether a missed deadline can end the application.

South Korea’s rules are national and are administered by the Ministry of Intellectual Property, or MOIP. The deadlines discussed here come from national patent and trademark law rather than separate Seoul, Incheon, Busan, or Daejeon rules. The practical difficulty is usually the handoff between the foreign applicant, a Korean patent attorney or agent, and the translator preparing the Korean filing text.

Who this guide is for

This nationwide guide is for foreign inventors, companies, universities, research institutions, brand owners, foreign IP lawyers, and paralegals who want to obtain patent or trademark protection in South Korea. The main working language pair is English-to-Korean, although Chinese-to-Korean and Japanese-to-Korean matters are also possible. There is no official ranking proving which language pair is most common.

Typical files include patent specifications, claims, abstracts, drawing text, PCT Article 19 or Article 34 amendments, trademark goods and services, priority documents, applicant information, and powers of attorney. The guide is especially useful when a priority date or PCT deadline is approaching and the foreign applicant has source documents but has not yet delivered a controlled Korean version to a Korean patent attorney.

Choose the Korean filing route before ordering translation

In Korean practice, the official concept is usually a Korean translation or 국어번역문. If a Korean agent asks for a signed translation certificate for a particular document, follow that instruction. Do not assume that an English certificate of accuracy automatically replaces the Korean filing document.

South Korea patent translation deadline: direct foreign-language applications

Article 42-3 of the Korean Patent Act allows an applicant to state that the specification and the explanatory part of drawings will be written in a prescribed non-Korean language. The official legal interpretation concerning English-language filing identifies English as the permitted language for this route. This is a limited filing mechanism, not permission to submit every part of the application in English and translate everything whenever convenient.

The Korean translation is due by the date specified in Article 64(1) plus one year and two months. Where a priority claim is involved, the relevant date generally follows the earliest priority date; without priority, it generally follows the Korean filing date. This is why the South Korea patent translation deadline is not simply 14 months after the Korean filing date.

There is also an earlier trigger. If the applicant receives notice that another person has requested examination before the normal translation deadline, the translation is due three months from the notice date or by the one-year-and-two-month date, whichever comes first.

If the Korean translation of the specification is not submitted on time, the application is treated as voluntarily withdrawn on the following day. A replacement Korean translation may be filed before the deadline, but not after the applicant has made an actual amendment or requested examination. The current enforcement rules provide the prescribed filing method and forms for the Korean translation and correction of mistranslation.

Counterintuitive point: South Korea’s English-language filing option can help secure a filing date, but it makes the later Korean translation more important. The Korean translation becomes the operative text for later prosecution and may define the practical boundary of the rights being pursued.

Direct patent translation package

• Applicant, inventor, title, priority, and filing information for the Korean application form.
• The original English specification, claims, and explanatory text in drawings.
• The exact claim set intended for Korean filing, including all approved amendments.
• Any abstract, title, or application-field material the Korean agent requires in Korean.
• Power of attorney and documents proving the agent’s authority, where applicable.
• A version history showing which source file is final and which files are obsolete.

PCT national phase: why 31 months is not automatically 32

For a foreign-language PCT application entering South Korea, Article 201 requires the Korean translation by the end of the domestic written-submission period, normally 31 months from the priority date. The translation covers the description, claims, explanatory text in drawings, and abstract. The applicant also needs to coordinate the Article 203 domestic-phase written document within the applicable period. The MOIP national-phase guide and the WIPO Korea national-phase guide should be checked together.

South Korea permits a conditional one-month extension for the Korean translation. The applicant must state the intention to extend the translation period in the Article 203 written submission during the prescribed window before the 31-month period expires. The result may be a translation deadline at 32 months, but the extension does not turn every national-phase obligation into a 32-month obligation.

If the description and claims translation is not submitted within the applicable period, the PCT application is treated as withdrawn in South Korea. If a translation of an Article 19 or Article 34 amendment is not filed when required, that amendment may be treated as not made.

If the same portfolio also enters Japan, compare the Korean route with our PCT application guide for Japan. The deadlines and translation consequences are not interchangeable between countries.

Article 19 and Article 34 version control

A common failure is sending the translator only the original PCT publication. If the applicant amended the claims under Article 19, the amended claims may need a Korean translation or may replace the original claim translation under the Korean rules. Article 34 amendments can involve the description, claims, and drawing text. The translator and Korean agent need the original version, the amendment, and the final instructions—not only the latest PDF downloaded from a public database.

A full Korean translation of the priority document is not automatically the same as the national-phase translation. The MOIP’s PCT FAQ states that a priority-document translation may be requested when an examiner finds it necessary for substantive examination. That is different from the Korean translation of the PCT application itself.

Direct Korean trademark filing: the three-month priority-document deadline

Direct trademark filing follows a different logic. The MOIP’s trademark guidance says that an application not written in Korean may be returned without an application number. It also states that a foreign applicant without a Korean address or place of business must file through a Korean patent agent.

The working package normally includes the applicant’s name and address, the mark, the Korean wording for designated goods or services, the relevant Nice classes, priority information, the mark specimen, and a power of attorney when required. MOIP explains that the application is the document submitted at filing and that missing specimens or a power of attorney may lead to a notice of amendment in specified situations. For deadline planning, submit a complete package through the agent instead of relying on a later amendment notice.

If priority is claimed, the priority document must be submitted within three months of the Korean trademark filing date. MOIP states that this period cannot be extended. Failure to provide the required priority copy correctly can cause the priority claim to fail. The MOIP trademark application procedure provides the document list and formal filing warnings.

Do not import the patent’s 14-month foreign-language translation rule into a direct trademark filing. Translate the application content and designated goods or services into Korean before filing, and have the Korean agent confirm the final wording. The Korean wording is not merely a formatting choice; it determines how the claimed goods or services are described.

How the submission order works in practice

1. Identify the route and calculate the dates. Record the earliest priority date, the Korean filing date, the PCT 31-month date, the possible translation-extension window, and the trademark three-month priority-document date.
2. Appoint the Korean agent early. MOIP’s FAQ states that applicants without a Korean residential or business address must appoint a Korean patent attorney for patent procedures. It also explains that online filing is limited by Korean residence or address requirements. Ask the agent to confirm the exact filing route before translation begins.
3. Freeze the source version. Label the original application, amended claims, Article 19 or Article 34 files, drawings, and final instructions. Do not let the translator choose between competing versions.
4. Translate the correct legal set. The work may include claims, description, abstract, drawing text, goods and services, priority material, and powers of attorney. The required set depends on the route.
5. Run a bilingual technical check. Check claim numbering, defined terms, reference numerals, units, chemical names, citations, tables, and consistency with the source version. A general certified translation certificate does not correct a wrong claim set.
6. Let the Korean agent complete the formal filing. Translation delivery is not the same as official receipt. The agent must review the package, use the required filing format, submit it through the official system, and return the application or receipt details.
7. Verify the record after filing. Keep the agent’s filing confirmation and application number. Use KIPRIS for public status or publication checks where available, but do not treat a machine-translated record as legal advice.

Country-wide Korean logistics: mail, waiting time, and cost

For a foreign applicant, the main practical node is the Korean representative rather than a walk-in visit to a local office. MOIP’s FAQ says that patent application information is sent by registered mail to the Korean address of the applicant or representative, not by ordinary email. Keep the representative’s address and contact details current, and do not rely on an email from a translation vendor as proof that a filing was accepted.

After filing, translation deadlines and examination waiting times are separate issues. The MOIP trademark procedure describes substantive examination as generally taking about five months, but that is an indicative administrative description rather than a promise. A patent application requires a separate examination request, and MOIP’s FAQ states that the request can generally be filed within five years from the application date. Neither figure should be used to postpone a translation or national-phase deadline.

South Korea does not publish a universal market price for patent or trademark translation. A commercial quote may depend on word count, claim count, technical field, drawing labels, Article 19 or Article 34 versions, bilingual review, formatting, and urgency. Treat translation, Korean-agent fees, and official fees as separate cost categories.

What Korean practitioners and applicants tend to catch late

Public guidance from Korean IP firms treats patent translation and localization as part of prosecution rather than ordinary document translation. Kiyul’s Korean patent prosecution guidance and Pine IP’s translation guidance are commercial practitioner materials, not official rules, but they reflect the practical importance of technical terminology and claim control.

• The highest-risk handoff is often version control, not page count.
• A translation supplier may deliver a polished certificate while the Korean agent still needs to rebuild the formal filing package.
• A PCT amendment that is missing from the translation set can matter more than a minor formatting defect.
• A trademark goods-and-services list can be linguistically fluent but legally too broad, too narrow, or inconsistent with the agent’s filing strategy.
• A translation correction procedure is not a substitute for selecting the correct source document before filing.

Local data: useful context, not a deadline calculator

MOIP reported 260,797 patent applications and 324,926 trademark applications in South Korea in 2025. The figures show that South Korea is a high-volume national IP system, which helps explain why foreign applicants need a controlled process for Korean terminology and filing versions. The statistics do not establish the most common language pair, average translation price, average translation turnaround, or an official translation-error rate. MOIP’s 2025 filing statistics should therefore be used as market context, not as a personal deadline calculator.

Commercial IP translation providers

The following companies publicly describe Korean patent or IP translation services. This is not a ranking or official endorsement. Their public service descriptions are self-published; confirm language pair, technical field, confidentiality, version control, certification wording, and whether a Korean agent will review and file the final package.

For a translation-only assignment, CertOf can be used as a document-preparation layer. It should not be treated as a substitute for a Korean patent attorney or trademark agent.

Public resources, verification, and complaint paths

• MOIP: Use the official MOIP Patent Customer Call Center for procedural verification. MOIP lists 1544-8080 for its customer center and gives the English inquiry address [email protected] on its MOIP’s FAQ.
• WIPO: Use the Korea section of the PCT Applicant’s Guide for national-phase translation and agent information.
• KPAA and IPridge: The KPAA IPridge directory can help locate Korean patent attorneys. KPAA warns that profile information and reviews are supplied by applicants and are not guaranteed to be current or accurate.
• KIPRIS: The KIPRIS search service can help check public patent, trademark, and prosecution records.
• Commercial translation disputes: Korea’s 1372 Consumer Counseling Center can handle consumer complaints about non-delivery, billing, or misleading commercial claims. See the Korea Consumer Agency procedure page.
• Agent conduct: Complaints about a Korean patent attorney’s professional conduct should be separated from a translation-vendor billing dispute and directed to the KPAA reporting center.

Fraud warning: verify notices and invoices

MOIP’s FAQ says patent application information is sent by registered mail to the Korean applicant or representative rather than by ordinary email. If a foreign applicant receives an email-only demand for a payment, publication fee, renewal fee, or urgent translation charge, verify it with the Korean representative or MOIP before paying. A consumer complaint does not itself extend a statutory deadline, so contact the Korean agent immediately if a real deadline may be at risk.

Where certified translation fits

For South Korean patent and trademark filing, certified translation is best understood as a client-facing service description. The legal workflow centers on an accurate Korean translation, the prescribed filing form, and the Korean agent’s submission. A certificate of accuracy may be useful for the client’s records or may be requested for a particular supporting document, but it is not a substitute for the required Korean filing text.

CertOf can help prepare English-to-Korean patent and trademark documents, including specifications, claims, abstracts, drawing text, PCT amendments, trademark goods and services, and supporting documents. We can maintain terminology, numbering, document order, and revision history. General explanations of certification and file delivery are covered in certified versus notarized translation, electronic certified translation formats, and the broader version control guidance for evaluating translation providers.

FAQ

What is the South Korea patent translation deadline for a direct foreign-language filing?

Under Article 42-3, the Korean translation is generally due one year and two months from the relevant Article 64 date. A priority claim normally makes the earliest priority date the practical starting point. If an earlier examination-request notice is served, the three-month notice period or the normal period applies, whichever comes first. A late Korean translation can cause the application to be treated as withdrawn.

Can I file an English patent application in South Korea and translate it later?

Yes, but only through the prescribed foreign-language patent route and with the required statement. The flexibility covers specified parts of the patent application, not every filing field. The Korean translation still must be submitted on time and should be reviewed by the Korean agent.

Is the South Korea PCT deadline 31 months or 32 months?

The standard national-phase and translation deadline is 31 months from the priority date. A one-month extension may apply to the Korean translation when the applicant properly requests it in the Article 203 filing window. It is not a general extension of every national-phase requirement.

Do Article 19 and Article 34 PCT amendments need Korean translation?

They may. The Korean rules distinguish the original PCT application from Article 19 and Article 34 amendments. Give the translator and Korean agent every amendment version and confirm which text should form the Korean prosecution record.

Does the entire PCT priority document need to be translated into Korean?

Not automatically in every national-phase filing. The MOIP’s PCT FAQ states that a priority-document translation may be requested when an examiner finds it necessary for substantive examination. This is separate from the required Korean translation of the PCT application.

Can a direct South Korean trademark application be filed in English?

Do not plan on it. The MOIP trademark guidance states that an application not written in Korean may be returned without an application number. Prepare the application and designated goods or services in Korean through the Korean agent.

How long do I have to submit a Korean trademark priority document?

The priority document must generally be submitted within three months of the Korean trademark filing date, and MOIP states that the period cannot be extended. If the document is not filed correctly, the priority claim can be invalidated.

Is a sworn, notarized, or certified translation always required?

The official filing materials cited here focus on Korean-language filings and Korean translations, not a universal sworn or notarized certificate. A Korean agent may request certification for a particular supporting document, so confirm the document-specific requirement before ordering.

Does a foreign applicant need a Korean patent attorney or agent?

MOIP states that an applicant without a Korean residential or business address must appoint a Korean patent attorney for patent procedures. The trademark guidance also requires a foreign applicant without a Korean address or place of business to proceed through a Korean patent agent.

Will MOIP email me an official filing deadline?

MOIP’s FAQ says patent application information is sent by registered mail to the Korean address of the applicant or representative rather than by email. Keep the Korean representative’s contact details current and verify unexpected payment demands before acting.

How early should I order the translation?

There is no universal official turnaround because the work depends on technical field, claim count, drawing text, amendment versions, and review requirements. Give the Korean agent enough time to check the translation and submit the final package; do not treat the translator’s delivery time as the statutory filing deadline.

Request a Korean filing-ready translation package

When requesting a quote from CertOf, send the complete source file, the applicable route, the earliest priority or PCT date, all Article 19 or Article 34 amendments, the target language pair, the Korean agent’s instructions, and the required delivery format. You can submit documents through CertOf’s translation service or review the online ordering workflow. If revisions or delivery timing are important, review the revision and delivery information before placing the order.

CertOf prepares translation and document packages. It does not act as a Korean patent attorney, file through PatentRO as legal representative, select patent strategy, determine trademark classification, or guarantee acceptance or registration. The Korean patent attorney or trademark agent remains responsible for legal review and official submission.

Disclaimer

This article is general information for planning a South Korean patent or trademark filing. Korean statutes, forms, fees, electronic procedures, and agency practice can change. Confirm the current deadline and document order with MOIP and the Korean patent attorney or agent handling the matter before filing.