Prosecution Insights
Last updated: October 27, 2026

Lyudmila Zaykova-Feldman, USPTO Patent Examiner

Listed by the USPTO as ZAYKOVA-FELDMAN, LYUDMILA

Tech Center 2800 • Art Units: 2857 2865

This examiner grants 68% of resolved cases

Performance Statistics

68.2%
Allow Rate
At TC average
152
Total Applications
+24.7%
Interview Lift
1176
Avg Prosecution Days
Based on 132 resolved cases, 2023–2026

Rejection Statute Breakdown

27.6%
§101 Eligibility
8.2%
§102 Novelty
50.8%
§103 Obviousness
12.3%
§112 Clarity

Currently Pending Office Actions

App #TitleStatusAssignee
18653466 SUBSURFACE STRATIGRAPHIC FRAMEWORK Non-Final OA Schlumberger Technology Corporation
18165484 METHOD AND DEVICE FOR OPERATING AN INFRASTRUCTURE SENSOR SYSTEM Non-Final OA Robert Bosch GmbH
18682938 FLOOD DEPTH ESTIMATION APPARATUS, FLOOD DEPTH ESTIMATION METHOD, COMPUTER READABLE MEDIUM, AND TRAINING APPARATUS Final Rejection Mitsubishi Electric Corporation
18057804 INTELLIGENT DUST ANALYSIS AND SUPPRESSION DURING ROAD HAULAGE OF MINING OUTPUT Non-Final OA INTERNATIONAL BUSINESS MACHINES CORPORATION
18656146 METHOD FOR INSPECTING A POWERPLANT COMPONENT USING AN INSPECTION SCOPE Non-Final OA RTX Corporation
18669568 ROOT CAUSE ANALYSIS FOR ALARM EVENTS Non-Final OA Honeywell International Inc.
17192355 SYSTEMS AND METHODS FOR PROCESS CHAMBER HEALTH MONITORING AND DIAGNOSTICS USING VIRTUAL MODEL Final Rejection APPLIED MATERIALS, INC.
18800115 METHOD FOR ESTIMATING GROUPING EFFICIENCY, ELECTRONIC DEVICE AND STORAGE MEDIUM Non-Final OA EVE ENERGY CO., LTD.

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Frequently Asked Questions

What is examiner Lyudmila Zaykova-Feldman's allowance rate?

68.2% of resolved applications examined by Lyudmila Zaykova-Feldman were allowed (132 resolved cases), compared with 72.0% across Art Unit 2857 over the last five years.

Does an interview help with examiner Lyudmila Zaykova-Feldman?

This examiner's interview lift is +24.7 percentage points: the difference in allowance rate between resolved applications that had an examiner interview and those that did not.

How long does examiner Lyudmila Zaykova-Feldman take to allow a patent?

Applications allowed by Lyudmila Zaykova-Feldman took 1,176 days on average from filing to allowance.

Which art unit does examiner Lyudmila Zaykova-Feldman work in?

Lyudmila Zaykova-Feldman examines applications in Art Unit 2857 in Tech Center 2800 (Semiconductors, Circuits & Optics).

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