I paid the patent fee last year and this year, but the patent was not protected because I paid less. What is the refund procedure? thank you

I don't quite understand the real meaning of "the patent can't be protected because of insufficient payment". Let me summarize the possible situations involved.

First of all, if the party concerned delays the time limit specified in the Patent Law or Detailed Rules or the time limit specified by the patent administration department in the State Council due to irresistible reasons, resulting in the loss of his rights, he may, within two months from the date when the obstacle is removed, at the latest within two years from the date when the time limit expires, explain the reasons to the patent administration department in the State Council, and attach relevant supporting documents to request the restoration of his rights. In this step, you need to fill in the application for the restoration of rights and prepare documents that overcome the defects that lead to the loss of rights.

If the patent fee is underpaid, and the applicant or patentee has difficulty in paying the patent fee, he may file a request for reducing the payment with the Patent Office in accordance with the regulations.

If the applicant or patentee is an individual with an annual income of less than 25,000 yuan, the patent fee may be reduced or exempted.

If the applicant or patentee is a unit, multiple individuals or multiple individuals and a unit, and the unit is in financial difficulties, and the annual income of individuals is less than 25,000 yuan, the patent fee may be deferred.

Where two or more * * * units apply for a patent at the same time, the patent fee cannot be postponed.

If your topic is because "two or more companies * * * apply for patents at the same time, the patent fee cannot be postponed." The resulting patent is not protected. The Patent Office will take the initiative to refund the money. You can also follow the following procedures:

1. You can make a refund request to the State Council Patent Administration Department within 1 year from the payment date. Fill in the opinion statement.

2. Provide payment receipt.

Before the application for fee waiver is approved, if the party concerned requests the refund of all fees paid in accordance with the regulations, it cannot request the refund.