Prosecution Insights
Last updated: May 29, 2026

Examiner: MCCULLOUGH, ERIC J.

Tech Center 1700 • Art Units: 1773 1797

This examiner grants 31% of resolved cases

Performance Statistics

31.2%
Allow Rate
-33.8% vs TC avg
441
Total Applications
+43.4%
Interview Lift
1416
Avg Prosecution Days
Based on 397 resolved cases, 2023–2026

Rejection Statute Breakdown

0.1%
§101 Eligibility
3.1%
§102 Novelty
85.9%
§103 Obviousness
1.1%
§112 Clarity

Currently Pending Office Actions

App #TitleStatusAssignee
18298533 ADSORPTION DESALINATION DIRECT CONTACT MEMBRANE DISTILLATION SYSTEM Non-Final OA KING FAHD UNIVERSITY OF PETROLEUM AND MINERALS
17789438 HIGH-FLUX WATER PERMEABLE MEMBRANES Non-Final OA Ohio State Innovation Foundation
17618222 PURE WATER MANUFACTURING MANAGEMENT SYSTEM AND PURE WATER MANUFACTURING MANAGEMENT METHOD Final Rejection MITSUBISHI HEAVY INDUSTRIES, LTD.
17507982 MEDICAL DEVICES AND METHODS FOR MONITORING AND TREATMENT WITH SYNTHETIC POLYMERS EXHIBITING SPECIFIC BINDING Non-Final OA Boston Scientific Scimed, Inc.
18873924 ZINC IMIDAZOLE SALICYLALDOXIME-BASED ADSORPTIVE MEMBRANES FOR REMOVAL OF METAL IONS FROM AQUEOUS SOLUTIONS Non-Final OA THE BOARD OF REGENTS OF THE UNIVERSITY OF OKLAHOMA
17776799 FILTRATION COMPOSITES Non-Final OA Donaldson Company, Inc.
17579633 Purification and Enrichment of Boron Nitride Nanotube Feedstocks Non-Final OA Government of the United States, as represented by the Secretary of the Air Force
13990011 FORWARD OSMOSIS HOLLOW FIBER MEMBRANE Non-Final OA NANYANG TECHNOLOGICAL UNIVERSITY
18248456 MEMBRANE WITH IMMOBILIZED ANTICOAGULANT AND PROCESS FOR PRODUCING SAME Final Rejection GAMBRO LUNDIA AB
18832495 POLYTETRAFLUOROETHYLENE (PTFE) MEMBRANES WITH GRADIENT PORE STRUCTURES AND METHODS FOR PREPARING THE SAME Final Rejection FEATURE-TEC (SHANGHAI) ADVANCED MATERIALS CO., LTD.
18678361 SELF-CLEANING FILTER Final Rejection Ahlstrom Oyj
18671586 SYSTEM AND METHOD FOR ELECTRICALLY CONDUCTIVE MEMBRANE SEPARATION Non-Final OA SiTration, Inc
18441850 DISPOSABLE CELL REMOVAL SYSTEM Final Rejection EMD Millipore Corporation
18066610 ULTRAPOROUS NANOFIBER MATS AND USES THEREOF Final Rejection EMD Millipore Corporation
17857580 Porous Composite Membrane for Solvent Extraction Non-Final OA New Jersey Institute of Technology
18268915 MEMBRANE ATTACHMENT TECHNIQUE Final Rejection HYDROGEN MEM-TECH AS
18267023 PROCESS FOR ECONOMICAL PRODUCTION OF POLYMERS FROM NON-POLYMER-GRADE MONOMERS Non-Final OA UniSieve Ltd
18250379 FILTER FOR REMOVING SUBSTANCES FROM BLOOD Final Rejection Fresenius Hemocare Italia S.R.L.
18048505 BIOLOGICAL FILTRATION SYSTEMS AND CONTROLLING METHODS THEREOF Final Rejection ALIT BIOTECH (SHANGHAI) CO., LTD.
17908756 REMOVAL OF SILICA AND TOTAL ORGANIC CARBON FROM WASTEWATER Final Rejection NanoWaterTech Inc.

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