Prosecution Insights
Last updated: October 02, 2026

Examiner: XIAO, YAN

Tech Center 1600 • Art Units: 1642

This examiner grants 67% of resolved cases

Analysis

Yan Xiao is an examiner in Art Unit 1642 of Tech Center 1600. He has 770 resolved cases and an allowance rate of 67.3%. The median days to allowance is 1071, which is a standard duration for biological and chemical examinations. These figures indicate a balanced prosecution environment with a good probability of success. Practitioners should find the 67.3% allowance rate to be a favorable starting point for their applications.

The interview lift is 52.7%, which is exceptionally high. This suggests that interviews are an extremely effective way to secure an allowance with this examiner, nearly doubling the baseline probability. Practitioners should almost always consider an interview as a central part of their strategy. The 770 resolved cases provide a very strong statistical foundation for these metrics. With a 67.3% allowance rate and a 52.7% lift, the data strongly supports active engagement through oral advocacy. The 1071 days to allowance provides a clear benchmark for planning the prosecution timeline.

Written from this page's own data; every figure is computed from USPTO records and verified before publication.

Performance Statistics

67.3%
Allow Rate
+7.3% vs TC avg
800
Total Applications
+52.7%
Interview Lift
1071
Avg Prosecution Days
Based on 770 resolved cases, 2023–2026

Rejection Statute Breakdown

4.8%
§101 Eligibility
18.4%
§102 Novelty
26.3%
§103 Obviousness
27.1%
§112 Clarity

Currently Pending Office Actions

App #TitleStatusAssignee
18286471 ANTI-C1s ANTIBODY Non-Final OA Chugai Seiyaku Kabushiki Kaisha
18267835 POLYPEPTIDE Non-Final OA UCL Business Ltd
18263217 MULTABODY CONSTRUCTS, COMPOSITIONS, AND METHODS Non-Final OA THE HOSPITAL FOR SICK CHILDREN
18025883 A Scoring Method for an Anti-B7H4 Antibody-Drug Conjugate Therapy Final Rejection Medimmune Limited
18316672 EPHA3 AND MULTI-VALENT TARGETING OF TUMORS Final Rejection Wake Forest University Health Sciences
17926206 METHODS OF TREATING HER2 POSITIVE CANCER WITH TUCATINIB IN COMBINATION WITH TRASTUZUMAB AND AN OXALIPLATIN-BASED CHEMOTHERAPY Final Rejection Seagen Inc.
18261765 TUMOR-INFILTRATING LYMPHOCYTES WITH MEMBRANE BOUND INTERLEUKIN 15 AND USES THEREOF Non-Final OA OBSIDIAN THERAPEUTICS, INC.
18282667 METHODS FOR THE DIAGNOSIS AND TREATMENT OF T CELL-LYMPHOMAS Final Rejection UNIVERSITÉ PARIS-EST CRÉTEIL VAL DE MARNE
18025684 ANTIBODY CONSTRUCTS TO TARGET T CELL RESPONSES TO SARS-COV PROTEIN EXPRESSING CELLS, THEIR DESIGN AND USES Non-Final OA Greffex, Inc.
18267914 Tetravalent FZD and WNT Co-Receptor Binding Antibody Molecules and Uses Thereof Non-Final OA AntlerA Therapeutics Inc.
18016316 CANCER ANTIGEN FOR EARLY CANCER DETECTION Non-Final OA UCT RESEARCH AND DEVELOPMENT INC.

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