Prosecution Insights
Last updated: October 02, 2026

Examiner: SORKIN, DAVID L

Tech Center 1700 • Art Units: 1774 1793 1797 1799

This examiner grants 67% of resolved cases

Analysis

David L Sorkin has a volume of 1190 resolved cases in Art Unit 1774. The examiner maintains a 67.4 percent allowance rate. The median days to allowance is 1168. This 1168-day timeline is a benchmark for practitioners in Tech Center 1700.

An interview lift of 12.9 percent provides a benefit to the 67.4 percent baseline. This 12.9 percent lift suggests that verbal communication is a productive strategy for resolving rejections. The large sample size of 1190 cases gives confidence in these performance metrics. Practitioners can use the 1168-day median to estimate the time required for a successful outcome.

The 67.4 percent allowance rate and the 12.9 percent interview lift are the primary data points for strategy. In Art Unit 1774, these figures help define the probability of a grant. The 1168-day median pendency is a key factor for managing client expectations.

Written from this page's own data; every figure is computed from USPTO records and verified before publication.

Performance Statistics

67.4%
Allow Rate
+2.4% vs TC avg
1,231
Total Applications
+12.8%
Interview Lift
1168
Avg Prosecution Days
Based on 1191 resolved cases, 2023–2026

Rejection Statute Breakdown

0.9%
§101 Eligibility
30.9%
§102 Novelty
34.2%
§103 Obviousness
28.0%
§112 Clarity

Currently Pending Office Actions

App #TitleStatusAssignee
18408226 FOOD MIXING MACHINE WITH ACCESSORY AND BOWL IDENTIFICATION AND ASSOCIATED CONTROL FUNCTIONS Non-Final OA ILLINOIS TOOL WORKS INC.
18414056 CHUTE FOR A MIXER VEHICLE Non-Final OA Oshkosh Corporation
18297504 METHODS FOR OPERATING A BIOREACTOR WITH IMPELLER ASSEMBLY AND RELATED BIOREACTORS Final Rejection LIFE TECHNOLOGIES CORPORATION
18305538 PIPE SEGMENTS, NOZZLES, SYSTEMS AND METHODS FOR THERMOSET MANUFACTURING Non-Final OA The Boeing Company
18355902 CONDITIONING DRILLING FLUID Non-Final OA Saudi Arabian Oil Company
18608180 COATING SLURRY SUPPLY DEVICE Non-Final OA Kia Corporation
18531469 MIXING DEVICE Final Rejection CONTEMPORARY AMPEREX TECHNOLOGY (HONG KONG) LIMITED
18595146 BOWL ASSEMBLY FOR A MICRO-PUREE MACHINE Final Rejection SharkNinja Operating LLC
18526216 MICRO PUREE MACHINE Final Rejection SharkNinja Operating LLC
17920876 MODULAR BLENDER AND METHOD OF USING SAME Final Rejection Merck Sharp & Dohme LLC
18569137 DIRECT FEED PROPPANT SYSTEM Non-Final OA NATIONAL OILWELL VARCO, L.P.
18200005 APPARATUS FOR MANUFACTURING COSMETICS Final Rejection AMOREPACIFIC CORPORATION
18127977 APPARATUS FOR MANUFACTURING COSMETIC AND CONTROL METHOD THEREOF Final Rejection Amorepacific Corporation
18114541 CORDLESS FOOD PROCESSOR Final Rejection WHIRLPOOL CORPORATION
16470751 VARIEGATOR Final Rejection Conopco, Inc., d/b/a UNILEVER
18510321 EDUCTOR Final Rejection Levitronix GmbH
18687944 HOLLOW SHAFT IMPELLER Non-Final OA EMD Millipore Corporation
18690857 MIXING AND STIRRING APPARATUS, GYPSUM BOARD MANUFACTURING APPARATUS, AND GYPSUM BOARD MANUFACTURING METHOD Non-Final OA YOSHINO GYPSUM CO., LTD.
18258432 HELICAL MIXER Non-Final OA Radiometer Medical ApS
18561592 CONTACTLESS ACOUSTOFLUIDIC SAMPLE AGITATOR AND USES THEREOF Non-Final OA CORNELL UNIVERSITY
18053089 Control Systems For A Fluid Mixing Apparatus Final Rejection LIFE TECHNOLOGIES HOLDINGS PTE LIMITED
18261160 AN APPARATUS FOR ACTIVATING A CARTRIDGE COMPRISING A MULTI-COMPONENT MATERIAL AND/OR FOR MIXING BY VIBRATION SAID CARTRIDGE Non-Final OA SEPTODONT OU SEPTODONT SAS OU SPECIALITES SEPTODONT
18260863 Mixing Device Final Rejection Peeters Landbouwmachines B.V.

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