How can applicants correct errors in a published patent application?

Correcting errors in a published patent application depends on the nature of the error and when it’s discovered. According to MPEP 1121:

1. Before publication:
   • Applicants can review bibliographic information and scanned application papers via Patent Center or Private PAIR
   • Errors should be brought to the Office’s attention before technical preparations for publication begin (generally four months prior to the projected publication date)
2. After publication:
   • For material errors made by the Office, a corrected publication may be issued under 37 CFR 1.221(b)
   • For other errors or desired changes, applicants must file a request for republication under 37 CFR 1.221(a)

It’s important to note that certain errors, such as those in applicant or assignee information, are not considered material mistakes by the Office and can only be corrected through a request for republication.

To learn more:

• error correction
• patent application publication
• republication request
• corrected publication