Patent, Trademark & Design Prosecution in Korea

Generally, yes. An applicant with no domicile or place of business in Korea must normally act through a patent administrator who has a domicile or place of business in Korea. A statutory exception applies while the overseas applicant—or, for a company, its representative—is staying in Korea. In practice, foreign companies and their instructing counsel appoint a Korean patent attorney or Korean patent law firm to act as the administrator and manage the Korean proceedings.

The Korea patent filing documents generally include an application form, a specification, claims, an abstract, and drawings where applicable. Applicant and inventor details, priority information with supporting documents, and a power of attorney may also be needed. The exact package depends on the filing language, priority claims, and applicant structure, so the checklist should be confirmed for each case—particularly where multiple priority claims are involved.

Yes. Under Korea's foreign-language application system, patent filings in Korea may include a specification and drawing captions filed in English. The procedure is not English-only, however: the application form and abstract follow Korean-language requirements, and a Korean patent translation of the English materials must be filed within the statutory period. The practical point for foreign filers is that an English-language filing can secure the Korean filing date while the translation is prepared.

Yes. For a specification and drawing captions filed in English, the Korean patent translation is generally due within 14 months from the filing date or, where priority is claimed, the earliest priority date. If the applicant is notified that a third party has requested examination before then, the translation is due by the earlier of three months from that notice and the 14-month deadline. An applicant that requests examination must first file the translation. Missing the deadline causes the application to be deemed withdrawn, so the translation date should be docketed at filing.

Generally, yes. A Korea patent priority claim under the Paris Convention normally requires the Korean application to be filed within 12 months of the first qualifying filing. The priority claim and supporting documents must also satisfy Korean formal requirements. Before instructing a Korean filing, confirm the first filing date and country, the applicant identity, and the status of the priority documents—especially where the applicant of record differs between jurisdictions.

The Ministry of Intellectual Property (MOIP, formerly KIPO) first checks formal requirements. The application is generally laid open 18 months from the filing or priority date, and patent examination in Korea begins only after a separate examination request. Examination may lead to a notice of allowance, an Office Action, or a rejection, and the timeline varies with the technical field and prosecution history. Many applicants treat the examination-request timing as part of their broader filing strategy.

Yes. Filing does not start substantive examination automatically. Under the current Korean Patent Act, a Korea patent examination request must generally be filed within three years from the Korean filing date; if no timely request is made, the application is deemed withdrawn. The three-year window is also a planning tool: requesting early moves the application into examination sooner, while deferring keeps costs and commercial decisions flexible. Older applications and certain special filings may follow different rules.

A Korean patent Office Action response starts with the deadline: the general response period was extended from two months to four months on July 11, 2025, but the deadline stated in the individual notice always controls. Within that period, review every ground of rejection, the cited references, and each affected claim, and then respond with written arguments, amendments within the permitted scope, or both. Early review matters, because amendment options can narrow at later stages of prosecution.

Yes. Korean patent amendments are allowed within the limits that apply at each stage. Amendments may address the specification, claims, or drawings, but cannot add new matter beyond the original disclosure—so the scope of the original filing effectively sets the outer boundary of what can be claimed later. Amendment windows narrow as prosecution advances, which is why the Office Action, the original filing, the current claims, and the filing language should be reviewed together before responding.

Patent examination in Korea covers novelty, inventive step, industrial applicability, patentable subject matter, clarity, support, and the other statutory requirements under Korean law. Patent rights are territorial: a grant in another country does not guarantee a Korean patent, because MOIP applies Korean law and its own examination practice. Prior prosecution history in other jurisdictions can still inform the Korean claim strategy.

There is no single fixed Korea patent filing cost. Korea patent fees and related costs typically include MOIP filing and examination fees, claim-based official charges, Korean translation costs, professional fees, Office Action response work, and later registration and annuity fees. Because claim count and specification length drive several of these components, a reliable estimate requires the document length, number of claims, translation scope, priority details, and the expected level of prosecution work for the specific case.

There is no single reliable Korea patent timeline that applies to every case. Timing depends on when examination is requested, the technical field, MOIP workload, whether an Office Action is issued, the response strategy, and whether an expedited procedure applies. Any estimate should be case-specific and dated, and treated as a projection rather than a guarantee. Applicants managing product-development or launch schedules should build the examination-request timing into the plan from the start.