Is the annual fee for utility model patent invalid or just a loss without paying the patent?
If the annual fee for utility model patent is not paid, there will be a late fee. If it is paid, it will not expire. If not, the patent right will be lost. There is a restoration fee 1000 yuan, and it will be invalid if it is not paid. You can't enjoy the patent right, which has been made public and doesn't belong to the obligee.