Prosecution Insights
Last updated: October 27, 2026

Keling Nmn Zhang, USPTO Patent Examiner

Listed by the USPTO as ZHANG, KELING NMN

Tech Center 1700 • Art Units: 1725 1732 1767

This examiner grants 67% of resolved cases

Analysis

ZHANG, KELING NMN has resolved 226 cases in Tech Center 1700 and Art Unit 1725. The allowance rate is 66.8%, while the interview lift is 17.6%. The median time to allowance is 1204 days. The data shows allowances in a majority of resolved cases, with interviews associated with a smaller reported effect on prosecution outcomes.

The listed companies are DIC Corporation, Rhodia Operations, and Massachusetts Institute of Technology. The leading firms are HSML P.C., OBWB - Solvay (ECo), and Troutman Pepper Locke LLP. Practitioners can use these applicant and counsel associations to identify relevant chemical technology experience and filing patterns.

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

Performance Statistics

66.8%
Allow Rate
+1.8% vs TC avg
279
Total Applications
+17.6%
Interview Lift
1204
Avg Prosecution Days
Based on 226 resolved cases, 2023–2026

Rejection Statute Breakdown

0.5%
§101 Eligibility
15.7%
§102 Novelty
51.0%
§103 Obviousness
27.1%
§112 Clarity

Currently Pending Office Actions

App #TitleStatusAssignee
17978010 Facile Synthesis of Aluminum Salts Using Activated Aluminum Precursor Final Rejection Massachusetts Institute of Technology
18504126 HALIDE PRODUCING METHOD Non-Final OA Panasonic Intellectual Property Management Co., Ltd.
17883772 METAL DOUBLE SALT DISPERSION LIQUID, METHOD FOR PRODUCING METAL DOUBLE SALT DISPERSION LIQUID, METAL OXIDE NANOPARTICLE DISPERSION LIQUID, AND METHOD FOR PRODUCING METAL OXIDE NANOPARTICLE DISPERSION LIQUID Final Rejection Murata Manufacturing Co., Ltd.
18021765 SUPPORTED CATALYST FOR PRODUCING CARBON NANOTUBES Final Rejection LG CHEM, LTD.
18281625 MOLYBDENUM COMPOUND AND PRODUCTION METHOD THEREFOR Final Rejection DIC Corporation
18276273 METAL-DOPED MOLYBDENUM SULFIDE POWDER AND PRODUCTION METHOD THEREFOR Final Rejection DIC Corporation
18263661 ACTIVATION OF REDUCED AND PASSIVATED CATALYST Final Rejection Johnson Matthey Davy Technologies Limited
18547782 GYPSUM COMPOSITION FOR MOLD PRODUCTION Final Rejection YOSHINO GYPSUM CO., LTD.
17440471 SELECTIVE REDUCING CATALYST FOR DIESELS AND DIESEL EXHAUST GAS PURIFICATION APPARATUS Final Rejection N.E. CHEMCAT CORPORATION
18039798 DENTAL PRODUCT FOR FORMING AN ENDODONTIC CEMENT Final Rejection PRODUITS DENTAIRES PIERRE ROLLAND
18075768 METHODS AND SYSTEMS FOR TREATMENT OF LIME TO FORM VATERITE Non-Final OA Arelac, Inc.

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Who Appears Before This Examiner

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Frequently Asked Questions

What is examiner Keling Nmn Zhang's allowance rate?

66.8% of resolved applications examined by Keling Nmn Zhang were allowed (226 resolved cases), compared with 65.5% across Art Unit 1725 over the last five years.

Does an interview help with examiner Keling Nmn Zhang?

This examiner's interview lift is +17.6 percentage points: the difference in allowance rate between resolved applications that had an examiner interview and those that did not.

How long does examiner Keling Nmn Zhang take to allow a patent?

Applications allowed by Keling Nmn Zhang took 1,204 days on average from filing to allowance.

Which art unit does examiner Keling Nmn Zhang work in?

Keling Nmn Zhang examines applications in Art Unit 1725 in Tech Center 1700 (Chemistry & Materials).

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