Prosecution Insights
Last updated: August 18, 2026

Examiner: LEFF, ANGELA MARIE DITRAN

Tech Center 3600 • Art Units: 1765 3674 3676

This examiner grants 70% of resolved cases

Performance Statistics

69.8%
Allow Rate
+17.8% vs TC avg
1,078
Total Applications
+13.2%
Interview Lift
1050
Avg Prosecution Days
Based on 1039 resolved cases, 2023–2026

Rejection Statute Breakdown

2.0%
§101 Eligibility
19.8%
§102 Novelty
41.4%
§103 Obviousness
26.6%
§112 Clarity

Currently Pending Office Actions

App #TitleStatusAssignee
19302807 FLUID LOSS CONTROL AGENT FOR AQUEOUS WELLBORE FLUIDS Final Rejection Schlumberger Technology Corporation
18577823 SUBTERRANEAN WATER CONTROL USING SWELLABLE ELASTOMERIC PARTICLES Final Rejection Schlumberger Technology Corporation
18880767 AQUEOUS COMPOSITIONS COMPRISING FUNCTIONALIZED SACCHARIDE POLYMERS FOR DEWATERING OF PARTICULATES Non-Final OA INTEGRITY BIO-CHEMICALS, LLC
18635351 RANGING DEVICE Non-Final OA CANON KABUSHIKI KAISHA
19345721 EUTECTIC METAL ALLOY-CONTAINING CEMENT AND METHODS OF USE THEREOF Final Rejection SAUDI ARABIAN OIL COMPANY
19173675 BLOWING AGENT INCORPORATED RESIN SYSTEMS FOR CONSOLIDATING SUBTERRANEAN OIL AND GAS BEARING FORMATIONS Final Rejection SAUDI ARABIAN OIL COMPANY
19022657 REDUCED-POLYMER-LOADING, HIGH-TEMPERATURE FRACTURING FLUIDS AND METHODS AND SYSTEMS RELATED THERETO Non-Final OA SAUDI ARABIAN OIL COMPANY
18749660 TIME DEPENDENT TRACER RELEASE IN STIMULATED GAS WELLS USING PARTIALLY DEGRADABLE PARTICULATES Final Rejection SAUDI ARABIAN OIL COMPANY
18625698 METHODS TO SELECT BRINE RECIPES FOR WATERFLOODING OPERATIONS Non-Final OA Saudi Arabian Oil Company
18341451 PREVENTING WATER PRODUCTION IN SUBTERRANEAN FORMATIONS Final Rejection Saudi Arabian Oil Company
19279818 COMBINATION PRODUCTS CONTAINING ANTI-AGGLOMERANT LOW DOSE HYDRATE INHIBITORS AND CORROSION INHIBITORS WITH IMPROVED CORROSION RESISTANCE Final Rejection ChampionX LLC
18461676 COMBINATION PRODUCTS CONTAINING ANTI-AGGLOMERANT LOW DOSE HYDRATE INHIBITORS AND CORROSION INHIBITORS WITH IMPROVED CORROSION RESISTANCE Final Rejection ChampionX LLC
19074580 METHOD FOR TREATING A WELL BORE FOR DEHYDROSULFURIZATION Non-Final OA KING FAHD UNIVERSITY OF PETROLEUM AND MINERALS
19075283 SCALE INHIBITION IN A WELLBORE Non-Final OA KING FAHD UNIVERSITY OF PETROLEUM AND MINERALS
18631863 METHODS FOR STABILIZING SUBTERRANEAN FORMATIONS Non-Final OA King Fahd University of Petroleum and Minerals
18454005 BIOLOGICAL CEMENT WITH ALGAL BIOMATTER Final Rejection University of Washington
19203582 Method for Removing Metal Contaminants Non-Final OA Cameron International Corporation
18374160 POLYPROPYLENE RESIN EXTRUDED FOAM PARTICLES Non-Final OA KANEKA CORPORATION

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