What forms are used for assignee revocation of power of attorney in pre-AIA applications?

For pre-AIA applications (filed before September 16, 2012), the MPEP mentions a specific form that can be used by assignees to revoke a power of attorney and appoint a new one:

Form PTO/SB/80 may be used by an assignee of the entire interest of the applicant to revoke a power of attorney and appoint a new power of attorney.

The process involves:

• The assignee signing the power of attorney (Form PTO/SB/80)
• Either the assignee or the newly appointed practitioner signing a statement under pre-AIA 37 CFR 3.73(b)

Additionally, Form PTO/SB/96 or an equivalent can be used for the Statement Under pre-AIA 37 CFR 3.73(b). For details on who can sign this statement, refer to MPEP § 324, subsection V.

To learn more:

• pre-AIA
• power of attorney
• assignee
• revocation
• USPTO forms