Prosecution Insights
Last updated: April 19, 2026

Examiner: LEFF, ANGELA MARIE DITRAN

Tech Center 3600 • Art Units: 3674 3676

This examiner grants 70% of resolved cases

Performance Statistics

69.9%
Allow Rate
+17.9% vs TC avg
1060
Total Applications
+13.1%
Interview Lift
1081
Avg Prosecution Days
Based on 1029 resolved cases, 2023–2026

Rejection Statute Breakdown

1.3%
§101 Eligibility
20.0%
§102 Novelty
40.3%
§103 Obviousness
27.2%
§112 Clarity

Currently Pending Office Actions

App #TitleStatusAssignee
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
19173675 BLOWING AGENT INCORPORATED RESIN SYSTEMS FOR CONSOLIDATING SUBTERRANEAN OIL AND GAS BEARING FORMATIONS Non-Final OA 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 Non-Final OA SAUDI ARABIAN OIL COMPANY
18679871 SUPER HYDROPHOBIC 2D NANOSHEET MATERIALS FOR IMPROVED OIL RECOVERY Final Rejection SAUDI ARABIAN OIL COMPANY
18643715 DRILLING WITH WATER-BASED MUD INCLUDING MULTIPLE CLAYS Non-Final OA Saudi Arabian Oil Company
18341451 PREVENTING WATER PRODUCTION IN SUBTERRANEAN FORMATIONS Final Rejection Saudi Arabian Oil Company
18982827 SCALE INHIBITOR SQUEEZE TREATMENT Non-Final OA Halliburton Energy Services, Inc.
18375251 HYDRAULIC CEMENT FOR CARBON DIOXIDE ENVIRONMENTS Non-Final OA Halliburton Energy Services, Inc.
19302807 FLUID LOSS CONTROL AGENT FOR AQUEOUS WELLBORE FLUIDS Non-Final OA Schlumberger Technology Corporation
19103837 METHODS AND SYSTEMS FOR DETERMINING PROPPANT CONCENTRATION IN FRACTURING FLUIDS Final Rejection SCHLUMBERGER TECHNOLOGY CORPORATION
18936748 COMPOSITIONS AND METHODS FOR GAS LIFTED WELL DELIQUIFICATION Final Rejection ChampionX LLC
18454005 BIOLOGICAL CEMENT WITH ALGAL BIOMATTER Non-Final OA University of Washington
18387939 Method of Detecting Flow Assurance Using a Tagged Asphaltene Inhibitor Final Rejection Baker Hughes Oilfield Operations LLC
18992828 HYDROGEN SULFIDE SCAVENGING COMPOSITIONS Non-Final OA Swellfix UK Limited
18262342 USE OF A MINERAL COMPONENT, SAND, WOOD FLOUR OR COMBINATIONS THEREOF FOR REDUCING THERMAL CONDUCTIVITY OF A MINERAL FOAM Non-Final OA Amrize Technology Switzerland LLC
18825332 RESERVOIR INFLOW MONITORING Final Rejection RESMAN AS
18965998 METHOD FOR REDUCING THE VISCOSITY OF HEAVY OIL FOR EXTRACTION, TRANSPORT IN PIPES, AND CLEANING THEREOF Final Rejection University of Houston System
18283873 DRY GRINDING OF CLAY MINERAL, GROUND CLAY MINERAL, AND ITS USE IN CONSTRUCTION MATERIALS Non-Final OA SIKA TECHNOLOGY AG
18651517 TRACER RELEASE IN STIMULATED GAS WELLS USING PARTIALLY DEGRADABLE THERMOPLASTIC POLYAMIDE PARTICULATES Non-Final OA ARAMCO SERVICES COMPANY
18258366 BIOSURFACTANTS FOR IRON AND ZINC SULFIDE SCALE REMEDIATION AND CONTROL Final Rejection LOCUS SOLUTIONS IPCO, LLC
18556603 WATER-SOLUBLE ASSOCIATIVE AMPHOTERIC POLYMER AS A RHEOLOGY MODIFIER FOR SUBTERRANEAN TREATMENTS Final Rejection SNF Group
18548219 Formulations Containing Non-Ionic Surfactants as Emulsion-Modifiers in Oil Treatments Non-Final OA Sasol Chemicals GmbH

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