Submitted by 页之码 on Sat, 02/04/2023 - 14:13 来源: 页之码IP Patent Trademar Can't. The U.S. patent annual fee needs to be paid in three installments, each payment time is 4 years apart, and it needs to be paid within the time specified by the U.S. Patent Office, which are the 3.5th year, the 7.5th year and the 11.5th year. 查看申请流程 US U.S. 产品类型 Annuity Tags 专利申请 国际申请 海外申请 知识产权 PCT申请 年费 专利年费 专利有效 专利保护