Prosecution Insights
Last updated: October 25, 2026

Maris R Kessel, USPTO Patent Examiner

Listed by the USPTO as KESSEL, MARIS R

Tech Center 1700 • Art Units: 1699 1758 1759 1795

This examiner grants 50% of resolved cases

Analysis

Maris R. Kessel examines in Tech Center 1700 and Art Unit 1699, with 439 resolved cases. Her allowance rate is 50.3 percent, and the interview lift is 50.7 percent. The 50.7 percent lift indicates that an interview correlates with a higher probability of allowance relative to the 50.3 percent baseline rate.

The median days to allowance is 1380. The top company is Yangtze Delta Region Institute (Huzhou) University Of Electronic Science And Technology Of China. The top firm is NGUYEN TARBET IP Law. The 50.7 percent lift is nearly identical to the 50.3 percent allowance rate, highlighting the role of interviews. The 1380-day median pendency is the primary benchmark for the 439 resolved cases in this art unit.

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

Performance Statistics

50.3%
Allow Rate
-14.7% vs TC avg
445
Total Applications
+50.7%
Interview Lift
1380
Avg Prosecution Days
Based on 439 resolved cases, 2023–2026

Rejection Statute Breakdown

2.0%
§101 Eligibility
15.5%
§102 Novelty
45.4%
§103 Obviousness
31.9%
§112 Clarity

Currently Pending Office Actions

App #TitleStatusAssignee
17465498 SWAB DEVICE WITH EMBEDDED TEST ELEMENT Non-Final OA Individual inventor
18487608 INDIUM OXIDE NANORODS, METHODS FOR PREPARING AND USING SAME Non-Final OA YANGTZE DELTA REGION INSTITUTE (HUZHOU), UNIVERSITY OF ELECTRONIC SCIENCE AND TECHNOLOGY OF CHINA

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Frequently Asked Questions

What is examiner Maris R Kessel's allowance rate?

50.3% of resolved applications examined by Maris R Kessel were allowed (439 resolved cases), compared with 59.4% across Art Unit 1699 over the last five years.

Does an interview help with examiner Maris R Kessel?

This examiner's interview lift is +50.7 percentage points: the difference in allowance rate between resolved applications that had an examiner interview and those that did not.

How long does examiner Maris R Kessel take to allow a patent?

Applications allowed by Maris R Kessel took 1,380 days on average from filing to allowance.

Which art unit does examiner Maris R Kessel work in?

Maris R Kessel examines applications in Art Unit 1699 in Tech Center 1700 (Chemistry & Materials).

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