Prosecution Insights
Last updated: October 26, 2026

Lois L Zheng, USPTO Patent Examiner

Listed by the USPTO as ZHENG, LOIS L

Tech Center 2800 • Art Units: 1733 1738 1759 1784 1793 2812

This examiner grants 68% of resolved cases

Analysis

ZHENG, LOIS L is assigned to Tech Center 2800 and Art Unit 1733. The profile reports 756 resolved cases and an allowance rate of 67.6%. The median time to allowance is 1349 days, making prosecution duration a material consideration for docketing, continuation, and commercialization planning.

The interview lift is 13.0%, indicating a modest association between interviews and allowance outcomes. Applicants may want to use interviews to isolate the examiner’s concerns, then address those concerns precisely in the written response. The represented companies include Chemetall GmbH, Toyota Motor Corporation, and SAFRAN. The listed firms are McBee Moore & Vanik, IP, LLC, CHRISTENSEN O'CONNOR JOHNSON KINDNESS PLLC, and Fox Rothschild LLP.

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

Performance Statistics

67.6%
Allow Rate
At TC average
799
Total Applications
+13.0%
Interview Lift
1349
Avg Prosecution Days
Based on 756 resolved cases, 2023–2026

Rejection Statute Breakdown

0.5%
§101 Eligibility
17.7%
§102 Novelty
57.3%
§103 Obviousness
14.2%
§112 Clarity

Currently Pending Office Actions

App #TitleStatusAssignee
18498668 ALUMINUM ALLOY AND METHOD FOR PRODUCING SAME Final Rejection TOYOTA JIDOSHA KABUSHIKI KAISHA
18486333 HEAT TREATMENT METHOD OF BEARING RING Non-Final OA AKTIEBOLAGET SKF
17788678 ALUMINUM ALLOY FOIL Final Rejection DAI NIPPON PRINTING CO., LTD.
17907105 CONVERSION COATING FOR CANS CONTAINING HYDROGEN SULFIDE PRODUCING LIQUIDS Final Rejection PPG Industries Ohio, Inc.
18698118 HEAT TREATED ALUMINUM SHEETS AND PROCESSES FOR MAKING Non-Final OA Novelis Inc.

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Frequently Asked Questions

What is examiner Lois L Zheng's allowance rate?

67.6% of resolved applications examined by Lois L Zheng were allowed (756 resolved cases), compared with 48.5% across Art Unit 1733 over the last five years.

Does an interview help with examiner Lois L Zheng?

This examiner's interview lift is +13.0 percentage points: the difference in allowance rate between resolved applications that had an examiner interview and those that did not.

How long does examiner Lois L Zheng take to allow a patent?

Applications allowed by Lois L Zheng took 1,349 days on average from filing to allowance.

Which art unit does examiner Lois L Zheng work in?

Lois L Zheng examines applications in Art Unit 1733 in Tech Center 2800 (Semiconductors, Circuits & Optics).

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