1. American invention patent: 20 years from the date of filing, and the maintenance fee shall be paid in the third and a half years, seven and a half years and eleven and a half years from the date of registration. The scope of protection relates to the patent of the composition or the method of using the composition, and its validity can be extended to 5 years at the longest.
2. American design patents: fourteen years from the date of registration. You can still file a patent application within half a year after publication (this is a big difference between American patent novelty judgment and China patent).
3. American patent for new plant varieties: 20 years from the date of application, and the maintenance fee shall be paid in the third, seventh and eleventh years from the date of registration.