U. S. patents cover inventions, There are three types of appearance design and new plant varieties.

United States patent for invention: From the date of application 20 years, Three and a half years from the date of registration respectively, Seven-and-a-half and eleven and a half years for maintenance. The scope of protection relates to the patent of the composition or the method of using the composition, Its validity can be extended, Can be extended at most 5 years.

United States design patent: Fifteen years from the date of authorization, And there is no annual fee. Patent applications can still be filed within six months after publication (This is a major difference between American patent novelty judgment and Chinese patent judgment) .

Plant new variety patent: From the date of application 20 years, Three and a half years from the date of registration respectively, Seven-and-a-half and eleven and a half years for maintenance.

There are three ways to apply for a U. S. patent: 1. Apply directly to the United States for a patent (A confidential review is required at the Chinese Patent Office in advance, After the confidentiality review is passed, You can apply for a patent directly in the United States) ; 2. Patent to the United States through the Paris Convention (Priority only 12 month) ; 3. pass PCT Patent Cooperation Treaty to patent the United States (Priority attainable 30 month) .

For more details, please click herehttps: //www. worldip. cn/uploadfile/2014/1126/20141126043213158. pdf