Legal analysis: No, but it depends on whether the claims are written in place. If there are loopholes, you can apply for a similar patent based on the loopholes, or you can apply for another new patent with some modifications. It's okay. Buying patent rights or investing in technology shares should be discussed with the parties involved. The patent is valid for 20 years, and upon expiration of 20 years it enters the public domain.
Legal basis: "Patent Law of the People's Republic of China" Article 11 After the patent right for an invention or utility model is granted, except as otherwise provided for in this law, any unit or individual may not The patentee shall not exploit the patent without the permission of the patentee, that is, he shall not manufacture, use, offer for sale, sell, or import his patented products for production and business purposes, or use his patented method, or use, offer for sale, sell, or import directly in accordance with the patented method. products obtained.