How does filing a CPA affect the prior application?
Filing a Continued Prosecution Application (CPA) has a significant effect on the prior application. According to the MPEP, A request for a CPA expressly abandons the prior application as of the filing date of the request for the CPA.
This means that when you file a CPA, the previous application is automatically abandoned in favor of the new CPA. The CPA will use the file wrapper and contents of the prior application, including the specification, drawings, and oath or declaration, and will be assigned the same application number as the prior application.
To learn more:
Topics:
MPEP 200 - Types and Status of Application; Benefit and Priority,
Patent Law,
Patent Procedure