This is a notification to officially close the referenced RFI-USPTO-AI-PATENT-SEARCH-18 (USPTO's Challenge to Improve Patent Search With Artificial Intelligence). USPTO has concluded its market research on the subject matter. This Request for Information (RFI) was utilized for market research purposes only. No Request for Proposals (RFP), Request for Quotes (RFQ), or direct contract awards will be issued using this RFI. The United States Patent and Trademark Office would like to thank all that participated and showed interest and encourage your to participate in future opportunities.