Prosecution Insights
Last updated: October 02, 2026

Examiner: ROST, ANDREW J

Tech Center 3700 • Art Units: 3753

This examiner grants 66% of resolved cases

Analysis

Andrew J. Rost works in Art Unit 3753 of Tech Center 3700. The examiner has handled 840 resolved cases, maintaining an allowance rate of 65.6 percent. This data reflects a consistent track record across a significant number of patent applications, providing a reliable baseline for applicants. The 65.6 percent allowance rate suggests a balanced examination environment where success is achievable through diligent prosecution and clear technical disclosure of the invention's merits.

The interview lift is 19.9 percent, suggesting that interviews are a productive tool for applicants. Engaging in direct dialogue with the examiner can help resolve outstanding issues and increase the chances of reaching an allowance, as evidenced by the 19.9 percent lift in success. This indicates that the examiner is receptive to the additional context and clarification provided during oral discussions. Practitioners should consider scheduling an interview to address complex rejections and align on the scope of the claims.

The median days to allowance is 1159. This duration offers a benchmark for the expected time from filing to grant, helping applicants manage their expectations and strategic planning for their patent applications. The 1159-day median is a key metric for forecasting the timing of patent issuance and the associated costs. It provides a realistic view of the time commitment required to navigate the examination process within Art Unit 3753.

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

Performance Statistics

65.6%
Allow Rate
-4.4% vs TC avg
873
Total Applications
+19.9%
Interview Lift
1159
Avg Prosecution Days
Based on 840 resolved cases, 2023–2026

Rejection Statute Breakdown

0.5%
§101 Eligibility
24.0%
§102 Novelty
48.1%
§103 Obviousness
22.6%
§112 Clarity

Currently Pending Office Actions

App #TitleStatusAssignee
18987886 PILOT BLOCK SYSTEM TO LOCK A BLOWOUT PREVENTER STACK Non-Final OA Schlumberger Technology Corporation
19163973 INLET HOUSING Non-Final OA KYB Corporation
18785032 VENT PORT DIFFUSER Non-Final OA Taiwan Semiconductor Manufacturing Company, Ltd.
19282056 HIGH CONDUCTANCE VARIABLE ORIFICE VALVE Non-Final OA Applied Materials, Inc.
18775924 SYSTEMS AND METHODS FOR RISING STEM BALL VALVES Non-Final OA SCV Valve, LLC
18170964 Method and Apparatus for Integrated Pressure and Flow Controller Final Rejection MKS Inc.
17536549 TORQUE REDUCTION VALVE HAVING SEPARATE STATIC SEAL AND DYNAMIC SEAL Final Rejection Xomox PFT Corp.

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