发明专利的期限是多少年？-法律综合法律援助-法律咨询免费平台-国际律师联盟

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问题	发明专利的期限是多少年？
释义	律师分析: 根据有关法律法规，发明专利的有效期为二十年。每年应缴纳专利年费，以保持专利的有效性。专利权人在授予专利权的年度后未缴纳年费或者缴纳的金额不足的，专利权人应当自应当缴纳年费之日起最迟六个月内补缴，同时缴纳滞纳金。【法律依据】: 《中华人民共和国专利法》第四十二条发明专利权的期限为二十年，实用新型专利权和外观设计专利权的期限为十年，均自申请日起计算。
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