What are the exceptions to public inspection of patent application files?

While most patent application files are available for public inspection, there are several exceptions:

• Pending or abandoned applications that have not been published under 35 U.S.C. 122(b)
• Applications subject to a secrecy order
• Provisional applications
• Applications that have been terminated or denied and are no longer open to public inspection
• Interference files, until judgment is entered (subject to certain exceptions)
• Applications for extension of patent term and any related submissions
• Certain trade secret, proprietary, and protective order materials

These exceptions are in place to protect confidential information and maintain the integrity of the patent application process.