What can I find after the patent expires?

After the termination of the patent, you can find all descriptions of the patent, such as the patentee, inventor, contact person, address, agency, claims, instructions, etc. After the termination of the patent right, anyone can use the patented technology. The termination of the patent right refers to the expiration of the patent protection period or the invalidation of the patent right for some reason. There are mainly the following situations: (1) Failure to pay the annual fee as required; (2) The patentee waives the patent right in writing; (3) When the patent right expires, the patent right will be terminated. Failing to pay or not paying in full the annual patent fee and late payment fee.