Prosecution Insights
Last updated: October 26, 2026

Yan Lan, USPTO Patent Examiner

Listed by the USPTO as LAN, YAN

Tech Center 3700 • Art Units: 1732 1749 1782 1784 3734

This examiner grants 63% of resolved cases

Analysis

LAN, YAN is assigned to tech center 3700 and art unit 1732. The profile covers 632 resolved cases, with a 63.1% allowance rate and a median of 1197 days to allowance.

Interviews correspond to a 22.0% lift in the recorded allowance outcome. The listed companies are Toppan Holdings Inc., Mitsui Chemicals Inc., and Arkema Inc. The leading firms are Studebaker Brackett PLLC, WOMBLE BOND DICKINSON (US) LLP, and BACON & THOMAS, PLLC. Practitioners may consider interview preparation when managing prosecution in this assignment.

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

Performance Statistics

63.1%
Allow Rate
-6.9% vs TC avg
678
Total Applications
+22.0%
Interview Lift
1197
Avg Prosecution Days
Based on 632 resolved cases, 2023–2026

Rejection Statute Breakdown

0.3%
§101 Eligibility
13.9%
§102 Novelty
61.2%
§103 Obviousness
20.1%
§112 Clarity

Currently Pending Office Actions

App #TitleStatusAssignee
18626829 LAMINATE, PACKAGE, AND PACKAGED ARTICLE Non-Final OA TOPPAN Holdings Inc.
18561173 PACKAGING MATERIAL FILM, PACKAGING MATERIAL, PACKAGING BAG, AND PACKAGE BODY Final Rejection TOPPAN Holdings Inc.
18585889 ARTICLES WITH SURFACE COATING AND METHODS FOR MAKING THE SAME Non-Final OA MEDTRONIC, INC.
17760082 COATING COMPOSITION, COATED METAL SHEET, AND DRAWN AND IRONED CAN AND MANUFACTURING METHOD OF SAME Non-Final OA TOYO SEIKAN GROUP HOLDINGS, LTD.
18578479 PAPER OR PAPERBOARD BASED PACKAGING LAMINATE Non-Final OA Stora Enso OYJ
18729990 RESIN COMPOSITION, MOLDED BODY, LAMINATE AND LAMINATED TUBE Non-Final OA MITSUI CHEMICALS, INC.
17995491 XYLYLENE DIISOCYANATE-CONTAINING CONTAINER, METHOD FOR STORING XYLYLENE DIISOCYANATE, AND METHOD FOR TRANSPORTING XYLYLENE DIISOCYANATE Non-Final OA MITSUI CHEMICALS, INC.

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Frequently Asked Questions

What is examiner Yan Lan's allowance rate?

63.1% of resolved applications examined by Yan Lan were allowed (632 resolved cases), compared with 53.6% across Art Unit 1732 over the last five years.

Does an interview help with examiner Yan Lan?

This examiner's interview lift is +22.0 percentage points: the difference in allowance rate between resolved applications that had an examiner interview and those that did not.

How long does examiner Yan Lan take to allow a patent?

Applications allowed by Yan Lan took 1,197 days on average from filing to allowance.

Which art unit does examiner Yan Lan work in?

Yan Lan examines applications in Art Unit 1732 in Tech Center 3700 (Medical Devices & Mechanical Engineering).

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