Can a power of attorney be revoked after the patent grant?

Yes, a power of attorney can be revoked after the patent grant. The process for revoking a power of attorney post-grant is similar to pre-grant revocation:

• The patent owner must file a revocation with the USPTO
• A new power of attorney should be filed if a new attorney is appointed
• The revocation should include the patent number

MPEP 2560 clarifies, “A power of attorney may be revoked at any stage in the proceedings of a case.” This includes both pre-grant and post-grant stages. The revocation becomes effective upon processing by the Office.

To learn more:

• power of attorney revocation
• post-grant procedures
• patent representation