For applications filed on or after June 8, 1995, utility and plant patents are granted for a term which begins with the date of the grant and usually ends 20 years from the date you first applied for the patent subject to the payment of appropriate maintenance fees. Design patents last 14 years from the date you are granted the patent. No maintenance fees are required for design patents.

Note: Patents in force on June 8, 1995 and patents issued thereafter on applications filed prior to June 8, 1995 automatically have a term that is the greater of the twenty year term discussed above or seventeen years from the patent grant.

Source: http://www.uspto.gov/inventors/patents.jsp

Fees vary depending on the type of patent application you submit. Fees may also vary according to the way you "claim" your invention. More information on filing fees and the number and type of claims.

There are three basic fees for utility patents:

• The filing fee, which is non-refundable whether or not a patent is granted. (This is the cost to have your invention "examined" by the US Patent and Trademark Office - remember, you may or may not get a patent!)
• The issue fee (you pay this only if your application is allowed)
• Maintenance fees (paid at 3 1/2, 7 1/2, and 11 1/2 years after your patent is granted - these fees "maintain" your legal protection).
• Additional fees may be required.

Typical fees are as follows (these are only intended to give you a "ballpark" estimate) these fees do not reflect all the possible variations in filing and patenting your invention - also, these fees are subject to change - thus, you are strongly advised to check the current fee schedule before submitting your application.

Typical filing fees for an Inventor when application filed with a written assertion of small entity status (See Simplified Small Entity Status Practice :

* Does not include the search fee or examination fee.

Source: http://www.uspto.gov/inventors/patents.jsp

Search Thai Patents along with other major authorities

1. Quick Search
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