試題詳解

3 An invention patent application is filed on January 1, 2010. The application is published 18 months later on July 1, 2011 and granted on May 30, 2013. The patent is valid until:
(A) May 30, 2033(20 years from the granted date of the patent)
(B) July 1, 2031(20 years from the publication date of the application)
(C) January 1, 2030(20 years from the filing date of the application)
(D) some other date