Can original disclosure information be expunged from a patent application?

No, original disclosure information cannot be expunged from a patent application. According to 37 CFR 1.59(a)(2):

Information forming part of the original disclosure (i.e., written specification including the claims, drawings, and any preliminary amendment present on the filing date of the application) will not be expunged from the application file.

This rule ensures that the complete original disclosure remains part of the patent application record.

To learn more:

• original disclosure
• patent application
• expungement
• USPTO rules