Can assignment records be expunged after issuance of a patent?

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Source: FAQ (MPEP-Based) BlueIron Update: 2024-09-09 10 Rules 5 Related FAQs This page is an FAQ based on guidance from the Manual of Patent Examining Procedure. It is provided as guidance, with links to the ground truth sources. This is information only: it is not legal advice. Yes, assignment records can be expunged even after a patent has been issued. The MPEP 323.01(d) states: ‘Expungement of any assignment records will be handled in accordance with 37 CFR 1.4(g). This may include expungement of documents recorded prior to, during, or after, prosecution of the application that matured into the patent.’ This means that the USPTO can consider expungement requests for assignment records at any stage, including after the patent has been granted. Related Rules from the Manual of Patent Examining Procedure 10 rules Collapse Assignment Records Are Distinct From Application File Records MPEP 323.01(d) Expunged Assignment Records Remain Visible MPEP 323.01(d) Recorded Assignment Documents Cannot Be Expunged Even If Invalid MPEP 323 Recorded Assignments Not Expunged Even If Invalid MPEP 323 Petitions to Correct Assignment Records Rarely Granted MPEP 323.01(d) Permitted Integrity of Assignment Records Must Be Proven MPEP 323.01(d) Assignment Documents Cannot Be Removed Once Recorded MPEP 323 Redacted Version Must Replace Expunged Document in Assignment Records Upon Granting Petition MPEP 323.01(d) Required Recording Fee Required for Corrective Documents MPEP 323 Required Corrective Document Must Identify Error Location MPEP 323 Required Other Related FAQs 5 FAQs Collapse What types of assignment records can be expunged? Can additional correct documents be recorded after an assignment record is expunged? What are the normal corrective procedures for assignment records? Are there any limitations on expunging assignment records at the USPTO? How can I request expungement of an assignment record?