Prosecution Insights
Last updated: October 26, 2026

Nathan T Leong, USPTO Patent Examiner

Listed by the USPTO as LEONG, NATHAN T

Tech Center 1700 • Art Units: 1715 1717 1718 1782 1788 1792 1794 1799

This examiner grants 71% of resolved cases

Analysis

LEONG, NATHAN T is assigned to Tech Center 1700 and Art Unit 1715. The profile includes 770 resolved cases, a 71.4% allowance rate, and a 23.9% interview lift. The median time to allowance is 1054 days. The substantial case record supports using these figures as a meaningful historical reference, and the interview measure indicates a material association with allowance outcomes.

The listed companies are Ucl Business Ltd., Thermwood Corporation, and SK Inc. The listed firms are Bookoff McAndrews, PLLC, IP & T GROUP LLP, and Law Office of Katsuhiro Arai. Counsel may prepare interviews as an important complement to written prosecution, especially when claim amendments can be explained efficiently in discussion. The allowance rate supports planning for favorable outcomes while retaining response contingencies. The median duration should inform budgets and portfolio schedules.

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

Performance Statistics

71.4%
Allow Rate
+6.4% vs TC avg
787
Total Applications
+23.9%
Interview Lift
1054
Avg Prosecution Days
Based on 770 resolved cases, 2023–2026

Rejection Statute Breakdown

1.2%
§101 Eligibility
12.8%
§102 Novelty
51.3%
§103 Obviousness
27.2%
§112 Clarity

Currently Pending Office Actions

App #TitleStatusAssignee
18839888 PROCESS FOR APPLYING COATING COMPOSITIONS HAVING DIFFERENT LEVELING PROPERTIES AND/OR SAG RESISTANCE TO DIFFERENT TARGET AREAS OF AN OBJECT Non-Final OA BASF COATINGS GMBH
19167931 METHODS FOR PRODUCING CARBON NANOTUBE DISPERSION PASTE, MIXTURE PASTE, AND ELECTRODE LAYER FOR LITHIUM ION SECONDARY BATTERY Non-Final OA KANSAI PAINT CO., LTD.
18225007 METHODS OF ADJUSTING UNIFORMITY, AND RELATED APPARATUS AND SYSTEMS, FOR SEMICONDUCTOR MANUFACTURING Final Rejection Applied Materials, Inc.
18556164 LAMINATED CAN END STOCK Final Rejection NOVELIS INC

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Frequently Asked Questions

What is examiner Nathan T Leong's allowance rate?

71.4% of resolved applications examined by Nathan T Leong were allowed (770 resolved cases), compared with 51.6% across Art Unit 1715 over the last five years.

Does an interview help with examiner Nathan T Leong?

This examiner's interview lift is +23.9 percentage points: the difference in allowance rate between resolved applications that had an examiner interview and those that did not.

How long does examiner Nathan T Leong take to allow a patent?

Applications allowed by Nathan T Leong took 1,054 days on average from filing to allowance.

Which art unit does examiner Nathan T Leong work in?

Nathan T Leong examines applications in Art Unit 1715 in Tech Center 1700 (Chemistry & Materials).

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