If the annual fee is not paid on time (except for the annual fee for the year of authorization), or the amount paid is insufficient, the annual fee can be paid within six months from the expiration date, and the late payment fee can also be paid. patent.
The patent right shall terminate from the date of expiration of the payment of annual fees. If it is overdue for more than six months, the patent will no longer be able to pay annual fees and the patent will be terminated. The Patent Office will issue a "Notice of Termination of Patent Rights". If there are legitimate reasons or force majeure and the fee cannot be paid within the above period, the patentee may request restoration of rights within 2 months after receiving the notice (official fee is 1,000 yuan) ), and at the same time make up the annual fee payable. If the two opportunities within these eight months are missed, the patent should expire.
Off topic, the reason why I know so clearly is because of my experience step by step! ! ! I forgot to pay the patent fee before, and my head hurt from all kinds of troubles, but I used an annual fee management software called Xiaofeibao to solve it. Friends who have a weak memory like me, I advise you to use a payment reminder tool. , really worry-free!