• Patent fees

Fees associated with filing patent applications in Thailand as well as other patent fees are available in the fee calculator.

• The term for filing patent applications in Thailand

The term for filing a conventional patent application in Thailand is 12 months from the date of priority. It is not possible to restore the priority right and to file the application after the 12-month term.

• Minimum for filing documents in Thailand

To obtain the date of filing for Thai patent application, it is necessary to submit Thai translation of the title, claims and abstract, full name(s) and address(es) of the applicant(s) and inventor(s); and the details of the priority application.

• Language of the Thai patent application

The official language of the patent registration in Thailand is Thai. The Thai translation of the patent specification may be submitted after filing, i.e. within 90 days from the filing date. However, late submission of the translation is subject to additional charges.

• Priority document

To confirm the priority right, the applicant must submit the certified copy of the priority document within 16 months from the filing date, however before the publication of the application. The translation of the priority document neither into Thai nor English is required.

• Power of Attorney requirements

The representative should be authorised to act on behalf of the applicant by the original of Power of Attorney. It should be notarized by the Notary Public; however, the legalisation is not required. The POA must be submitted simultaneously with filing or within 90 days from the date of filing by paying the fine.

• Additional documents

If the applicant is not the inventor, the original and notarized Deed of Assignment must be provided simultaneously with filing or within 90 days by paying the fine. If the applicant is the inventor, the Statement of Applicant’s Rights must be provided within the same time limits (notarization is not required).

• Substantive examination request

The substantive examination should be requested and paid within five years from the publication of the patent application in Thailand. There are no provisions regarding acceleration of the examination; however, submission of the granted patent in any examining country may speed up the examination process. Besides, it is possible to file a request for use of the search and examination results from the ASPEC member-country, and thus expedite the examination process. 

• Grace period

There is a grace period of 12 months before the date of filing for disclosure of the subject matter or details of the invention due to or in consequence of any unlawful act, or for disclosure by the inventor including display of the inventor’s work on an international or an official public exhibition.

• Grant and patent maintenance

Official fees for granting should be paid within 2 months from the date when Notice of Allowance was received. The annuity must be paid after the grant of the patent in Thailand. The first annuity should be paid within 60 days from the beginning of the 5th year of the patent validity term if the patent has already been issued. If the patent in Thailand is granted at the beginning of the 5th year from the date of application, the first annual fees must be paid within 60 days from the grant of a patent.

• Representation by a patent agent

For foreigners, it is required to appoint a certified patent agent in Thailand for filing patent applications.

• Notes

1. Online Search Database for Thai Patents.
2. Legal protection of the inventions in Thailand is also possible via petty patent, which is similar to Utility Model. The petty patent in Thailand provides protection period of 10 years from the date of filing.

Brief summary is based on the information provided by ANANDA INTELLECTUAL PROPERTY on 19.02.2024
Please contact us if the above information is not in conformity with Thai IP Laws.