Prosecution Insights
Last updated: May 29, 2026

Examiner: KARST, DAVID THOMAS

Tech Center 1700 • Art Units: 1632 1671 1732 1748 1767 1796

This examiner grants 64% of resolved cases

Performance Statistics

64.5%
Allow Rate
-0.5% vs TC avg
1,042
Total Applications
+10.2%
Interview Lift
1065
Avg Prosecution Days
Based on 983 resolved cases, 2023–2026

Rejection Statute Breakdown

0.6%
§101 Eligibility
6.2%
§102 Novelty
73.0%
§103 Obviousness
12.0%
§112 Clarity

Currently Pending Office Actions

App #TitleStatusAssignee
17781233 METHOD FOR PREPARATION OF LIGNIN OLIGOMERS Non-Final OA BASF SE
18337581 POLYMER, ORGANIC SEMICONDUCTOR MATERIAL, STRETCHABLE POLYMER THIN FILM, AND ELECTRONIC DEVICE Non-Final OA THE BOARD OF TRUSTEES OF THE LELAND STANFORD JUNIOR UNIVERSITY
18321416 METHOD FOR MAKING HEVL-FILTERING CONTACT LENSES Non-Final OA Alcon Inc.
18021604 Laser Direct Structuring Compositions Including a Crystalline Polyester Non-Final OA SHPP GLOBAL TECHNOLOGIES B.V.
18277649 HIGH MELT STRENGTH PP BLENDS FOR FOAM WITH HIGH THERMOSTABILITY Non-Final OA SABIC GLOBAL TECHNOLOGIES B.V.
18000869 PROCESS FOR PRODUCING THERMALLY STABILIZED LIGNIN Final Rejection Stora Enso OYJ
18527120 THREE-DIMENSIONAL PRINTING Final Rejection Hewlett-Packard Development Company, L.P.
18274115 TIRE INCORPORATING A RUBBER COMPOSITION INCLUDING A SPECIFIC HYDROCARBON RESIN Non-Final OA COMPAGNIE GENERALE DES ETABLISSEMENTS MICHELIN
18270646 PROCESS FOR PREPARING BISPHENOL A (BPA) IN THE PRESENCE OF 2-METHYL BENZOFURAN Non-Final OA Covestro Deutschland AG
18270643 PROCESS FOR PREPARING BISPHENOL A (BPA) IN THE PRESENCE OF CUMENE Non-Final OA Covestro Deutschland AG
18021451 NEAR-INFRARED LIGHT TRANSMITTING BLACK MATERIAL Non-Final OA SEKISUI CHEMICAL CO., LTD.
18043667 Color Stable Epoxy Compositions Final Rejection 3M INNOVATIVE PROPERTIES COMPANY
18274623 RESIN COMPOSITION AND MOLDED BODY Non-Final OA KURARAY CO., LTD.
17786414 SEALANT COMPOSITION Non-Final OA DOW GLOBAL TECHNOLOGIES LLC
18005009 ADHESIVE POLYETHYLENE COMPOSITION Final Rejection BOREALIS AG
18903397 PROCESSED LIGNIN AND PROCESS TO PREPARE SUCH Non-Final OA Avantium Knowledge Centre B.V.
18273244 PHOTOCURABLE COMPOSITION, CURED PRODUCT THEREOF, AND OPTICAL MATERIAL CONTAINING SAID CURED PRODUCT Non-Final OA Mitsubishi Gas Chemical Company, Inc.
18723317 WASH-RESISTANT COPOLYMER Non-Final OA ARKEMA FRANCE
18253035 TRANSPARENT COMPOSITIONS WITH GOOD ALCOHOL RESISTANCE AND FATIGUE STRENGTH Non-Final OA ARKEMA FRANCE
18035276 PROCESS FOR MAKING SILICONE RUBBER BASE COMPOSITIONS Non-Final OA DOW SILICONES CORPORATION
18002790 METHOD FOR OBTAINING BIOSOURCED POLYEPOXIDES WITH IMPROVED PROPERTIES Non-Final OA ROQUETTE FRERES
18036414 BIO-BASED SULFONE COPOLYMERS FREE OF BPA AND BPS Non-Final OA SYENSQO SPECIALTY POLYMERS USA, LLC
17784124 SIDE-CHAIN FUNCTIONALIZED POLY (ARYL ETHER SULFONES) COPOLYMER COMPRISING REACTIVE END-GROUPS Non-Final OA SYENSQO SPECIALTY POLYMERS USA, LLC
18091307 RESIN COMPOSITION AND ADHESIVE Non-Final OA AAC Technologies (Nanjing) Co., Ltd.
17906764 SYSTEMS AND METHODS FOR DRYING AND DEODORIZING LIGNIN Final Rejection Domtar Paper Company, LLC
17768713 Production of Fragments of Lignin with Functional Groups Non-Final OA Ecole Polytechnique Fédérale de Lausanne (EPFL)
18257679 LIGNIN-BASED BIOPLASTIC MATERIAL, PROCESSES FOR PREPARING THE SAME AND USES THEREOF Non-Final OA GREEN INNOVATION GMBH
18041037 COMPOSITION COMPRISING NON-IONIC SURFACTANT AND POLYETHER-MODIFIED SILOXANE AND ITS USE IN CYANIDE-LEACHING OF METAL ORES Non-Final OA CHT Germany GmbH
18018358 PHOTOCURABLE RESIN COMPOSITION, CURED FILM, AND MOLDED ARTICLE WITH CURED FILM Final Rejection CHUGOKU MARINE PAINTS, LTD.
18153729 AQUEOUS COATINGS MADE FROM POLYHYDROXYALKANOATE (PHA) CAKE Non-Final OA Meredian, Inc.

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