Notice by publication.
37 C.F.R. § 4.5
in effectEffective: 2024-07-01If the copy of the complaint that is mailed to the invention promoter is returned undelivered, then the USPTO will primarily publish a Notice of Complaint Received on the USPTO's Internet home page at http://www.uspto.gov. Only where the USPTO's Web site is unavailable for publication will the USPTO publish the Notice of Complaint in the Official Gazette and/or the Federal Register. The invention promoter will be given 30 days from such notice to submit a reply to the Notice of Complaint. If the USPTO does not receive a reply from the invention promoter within 30 days, the complaint alone will become publicly available.
Source: eCFRURL: https://www.ecfr.gov/api/versioner/v1/full/2024-07-01/title-37.xmlFetched: 7/26/2026