Prosecution Insights
Last updated: April 19, 2026

Examiner: CRAIG, DANIEL THOMAS

Tech Center 3600 • Art Units: 3676 3679

This examiner grants 86% of resolved cases

Performance Statistics

86.4%
Allow Rate
+34.4% vs TC avg
52
Total Applications
+27.3%
Interview Lift
598
Avg Prosecution Days
Based on 22 resolved cases, 2023–2026

Rejection Statute Breakdown

2.9%
§101 Eligibility
26.4%
§102 Novelty
48.0%
§103 Obviousness
22.0%
§112 Clarity

Currently Pending Office Actions

App #TitleStatusAssignee
18923037 ENHANCED COOLING DURING WASHOVER OPERATION Non-Final OA Halliburton Energy Services, Inc.
18897241 MULTILATERAL FLUID LOSS DEVICE EMPLOYING DEGRADABLE MATERIAL Non-Final OA Halliburton Energy Services, Inc.
18483328 DOWNHOLE PACKER APPARATUS PROMOTING RADIAL FLOW Non-Final OA Halliburton Energy Services, Inc.
18481734 DOWNHOLE TOOL INCLUDING A PACKER ASSEMBLY, A COMPLETION ASSEMBLY, AND A FIXEDLY COUPLED WHIPSTOCK ASSEMBLY Final Rejection Halliburton Energy Services, Inc.
18599985 RETRACTABLE BUMPER ASSEMBLY WITH LOCK Non-Final OA Ford Global Technologies, LLC
18643570 SYSTEM AND METHOD FOR CARBONATED WATER INJECTION FOR PRODUCTION SURVEILLANCE AND WELL STIMULATION Non-Final OA ExxonMobil Technology and Engineering Company
18893149 SYSTEM AND METHOD FOR BARRIER INSTALLATION IN A WELLBORE Non-Final OA Expro North Sea Limited
19173267 GRADED FILTER-SEPARATOR AND METHOD FOR USE Final Rejection Baker Hughes Oilfield Operations, LLC
18938904 BI-DIRECTIONAL METAL TO METAL SEALING SYSTEMS AND METHODS Non-Final OA Baker Hughes Oilfield Operations LLC
18555527 REAR-MOUNTED DOUBLE-CHANNEL ABRASIVE JET CUTTING DEVICE Non-Final OA CCTEG CHONGQING RESEARCH INSTITUTE
18442345 TAILGATE HINGE ASSEMBLY Non-Final OA FCA US LLC
18541754 VEHICLE BODY FRAME STRUCTURE Non-Final OA SUBARU CORPORATION
19039463 AUTOMATED STANDPIPE PRESSURE RELIEF VALVE Non-Final OA Nabors Drilling Technologies USA, Inc.
18702468 DOWNHOLE INJECTION TOOL AND METHOD FOR INJECTING A FLUID IN AN ANNULUS SURROUNDING A DOWNHOLE TUBULAR Non-Final OA SHELL USA, INC.
18765040 APPARATUSES AND SYSTEMS FOR IN-LINE WATER ANALYSIS, DOWNHOLE FLUID OPTIMIZATION, AND METHODS FOR MAKING AND USING SAME Final Rejection PfP INDUSTRIES LLC
18710248 AN IMPACT TRANSMISSION MECHANISM FOR A ROTARY PERCUSSION DRILLING TOOL Non-Final OA SINOPEC RESEARCH INSTITUTE OF PETROLEUM ENGINEERING
18691069 CAB FOR CONSTRUCTION MACHINE Non-Final OA HITACHI CONSTRUCTION MACHINERY TIERRA CO., LTD.
18558402 DRILLING RIG SYSTEM Final Rejection ADNOC DRILLING COMPANY P.J.S.C.
18265375 GREASELESS CORE BARREL HEAD ASSEMBLY Non-Final OA BOART LONGYEAR COMPANY
18036424 MOBILE DRILLING RIG, DRILLING UNIT, AND ENERGY CHAIN Non-Final OA BST-BECHEM GBR (vertretungsberechtigte Gesellschafter, Ulrich Bechem,

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