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Q20. Claiming Both U.S. and Japanese Priorities

Q20. Claiming Both U.S. and Japanese Priorities
 Assume the following facts:
 The original U.S. application is filed on January 1, 2005 and claims invention “A”; and
 The Japanese Convention application is filed on January 1, 2006 and claims priority on the original U.S. application. Then, whether a second Japanese application can be properly filed on January 1, 2007 with claims for inventions A and A’ and claim priority on 11
the original U.S. application, and also the first Japanese application?

A20. No, the second Japanese application cannot enjoy the benefit of priority based on said earlier original U.S. application. Further, the second Japanese application cannot enjoy the benefit of priority for invention A based on the first Japanese application, since the first Japanese application has already enjoyed the benefit of priority for invention A based on said earlier original U.S. application.