Are there any exceptions to the rule of two periods running simultaneously in patent applications?

Yes, there is an exception involving suggested claims. According to MPEP 710.04:

“For an exception involving suggested claims, see MPEP Chapter 2300.”

This exception relates to interference proceedings, which are detailed in MPEP Chapter 2300. In such cases, the handling of suggested claims may affect the running periods differently than in standard examination scenarios.

To learn more:

• patent application
• reply periods
• exceptions
• suggested claims
• interference proceedings