How do international patent filings and priority claims work?

The scope of this answer is “How do international patent filings and priority claims work”, so the answer below starts with what this case actually needs before setting out the general rules. Once the set is complete, check it line by line against the destination's own checklist before filing. Keep a copy of every source document plus the receipt or docket from each step. If the receiving body confirmed its requirements by email, keep that message with the file. The biggest risk in cases like this is doing the certification steps out of order, which forces a restart. The most frequent cause of delay in this group is missing supporting documents on the first submission. The terms that frame this page are international · patent · filings · priority. Public holidays and embassy closures move certification queues more than most people expect. If multiple certified sets are needed, order them all in the first round to avoid re-queuing. Before starting, confirm with the receiving body whether it wants an original, a certified copy or a certified translation, then check that names are spelled identically to the passport or ID card on every page, then verify the source document is still within any validity window the recipient applies. For patents, Thailand is a member of the Paris Convention and the Patent Cooperation Treaty (PCT), so applicants can claim priority or enter the national phase under each office's conditions. Translations of the description, claims, abstract and drawings must preserve technical wording and claim scope precisely, because a translation slip changes the scope of protection. IP translation must keep every number and term exact: application and registration numbers, filing and priority dates, Nice classes for goods and services, each claim, and the applicant and inventor names as they appear in the passport or company affidavit. Dates must state whether the Buddhist or Gregorian era is used, and seals and endnotes must be translated in full. Trademarks, invention patents, petty patents and design patents are registered with the Department of Intellectual Property (DIP), Ministry of Commerce, under the Trademark Act B.E. 2534 and the Patent Act B.E. 2522 as amended. A translation provider cannot grant, amend or confirm any right; its role is to render the text exactly, including application and registration numbers, the goods and services listed under each class, filing and publication dates, seals and the registrar's signature block. Cost and lead time depend on page count, target language, how technical the text is and the certification steps required, so every file is quoted before work starts. Send scans of every page together with the written requirements from the Department of Intellectual Property, the receiving agent or the requesting authority via LINE @NAATI, call +66 80-557-8887 or email ilc@thainotary.co.th.

ปรึกษาฟรี — LINE @NAATI · โทร 080-5578887 · อีเมล ilc@thainotary.co.th