Can CPC symbols be changed during the patent examination process?
Yes, CPC symbols can be changed during the patent examination process. According to MPEP 909.01(a):
“The examiner may change or add CPC symbols at any time during prosecution as appropriate.“
Reasons for changing or adding CPC symbols may include:
- Discovery of more relevant or specific CPC symbols during examination
- Amendments to the claims that alter the invention’s scope
- Identification of additional aspects of the invention requiring classification
- Correction of initial classification errors
It’s important to note that while CPC symbols can be modified, significant changes to the controlling classification (first-listed symbol) may impact the examination process and potentially require transferring the application to a different art unit.
To learn more: