revocation of patent造句

1 some of the time limits stipulated in the patent law are definite : the time limits for " requesting for substantive examination ", " payment of fees ", " claiming priority ", " requesting for revocation of patent " and " requesting for re-examination " as provided in the patent law and its implementing regulations are statutory time limits and are not extensible . others are extensible
地域性：是指一个国家依照其本国专利法授予的专利权,仅在该国法律管辖的范内有效,对其他国家没有任何约束力,外国对其专利不承担保护的义务,对其一项发明创造只在我国取得专利权,那么专利权人只在我国享有专利权或独占权。
It's difficult to find revocation of patent in a sentence. 用revocation of patent造句挺难的