Patent double application, utility model down, the invention is still under review. Can you still sell it at this time?

Hello, patents can be bought and sold at any stage, whether it is a patent application or an authorized patent, there is no problem in buying and selling. Patent applications or authorized patent transactions need to provide a sales contract to the China National Intellectual Property Administration Patent Office, and put forward a request for specification change, which will not be effective until the National Information Bureau issues a notice of qualified procedures. In addition, in the case of double application, if the invention patent is also authorized, and the invention and the new product are the same product, then you need to make a choice between utility model and invention, and you can only keep one. You should explain this clearly to the buyer, and it is best to write it into the transfer contract to avoid disputes in the future.