When is it necessary to inspect previously patented or abandoned application papers?

Inspecting previously patented or abandoned application papers is necessary in certain situations during patent examination. According to MPEP 711.04(b):

“In examination of an application it is sometimes necessary to inspect the application papers of a previously patented or abandoned application. It is always necessary to do so in the examination of a reissue application.”

This inspection is crucial for understanding the prior art, examining related applications, or evaluating the scope of a reissue application.

To learn more:

• Patent Examination
• Prior Art
• Reissue Applications
• Application Papers