Prosecution Insights
Last updated: August 18, 2026

Examiner: MCCULLOUGH, ERIC J.

Tech Center 1700 • Art Units: 1773 1797

This examiner grants 32% of resolved cases

Performance Statistics

32.1%
Allow Rate
-32.9% vs TC avg
445
Total Applications
+44.1%
Interview Lift
1417
Avg Prosecution Days
Based on 405 resolved cases, 2023–2026

Rejection Statute Breakdown

0.7%
§101 Eligibility
10.5%
§102 Novelty
57.7%
§103 Obviousness
24.8%
§112 Clarity

Currently Pending Office Actions

App #TitleStatusAssignee
18300473 PROCESS OF MANUFACTURE OF NON-OXIDE CERAMIC FILTRATION MEMBRANE Final Rejection MANN+HUMMEL LIFE SCIENCES & ENVIRONMENT HOLDING SINGAPORE PTE. LTD.
18364897 POLYIMIDE POLYMER FOR WATER TREATMENT Non-Final OA KING FAHD UNIVERSITY OF PETROLEUM AND MINERALS
18298533 ADSORPTION DESALINATION DIRECT CONTACT MEMBRANE DISTILLATION SYSTEM Non-Final OA KING FAHD UNIVERSITY OF PETROLEUM AND MINERALS
17618222 PURE WATER MANUFACTURING MANAGEMENT SYSTEM AND PURE WATER MANUFACTURING MANAGEMENT METHOD Non-Final OA MITSUBISHI HEAVY INDUSTRIES, LTD.
18091367 ZINC-BASED SULFUR COMPOUND SCAVENGER WITH REDUCED SOLIDS DEPOSITION Final Rejection Baker Hughes Oilfield Operations LLC
18761281 MEMBRANES FOR REMOVING METALLIC SPECIES FROM AMINES Non-Final OA ENTEGRIS, INC.
17707756 LIQUID PURIFICATION MEMBRANE INCLUDING CARBONACEOUS MATERIALS AND METHODS OF FORMING THEM Non-Final OA ENTEGRIS, INC.
18758631 FILTRATION MEMBRANES AND METHOD OF MANUFACTURE THEREOF Non-Final OA DuPont Electronic Materials International, LLC
17530397 FILTER MEDIA INCLUDING FIBERS COMPRISING A MATRIX POLYMER AND IMPACT MODIFIER, AND RELATED METHODS Non-Final OA Hollingsworth & Vose Company
18678361 SELF-CLEANING FILTER Non-Final OA Ahlstrom Oyj
17115184 HIGH BURST STRENGTH WET-LAID NONWOVEN FILTRATION MEDIA AND PROCESS FOR PRODUCING SAME Non-Final OA Ahlstrom Oyj
18268915 MEMBRANE ATTACHMENT TECHNIQUE Non-Final OA HYDROGEN MEM-TECH AS

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