Prosecution Insights
Last updated: October 02, 2026

Examiner: SIEFKE, SAMUEL P

Tech Center 1700 • Art Units: 1687 1732 1758 1772 1779 1797 1798

This examiner grants 63% of resolved cases

Analysis

Samuel P. Siefke is a high-volume examiner in Tech Center 1700 and Art Unit 1687. With 1052 resolved cases, the examiner has an allowance rate of 62.9 percent. This 62.9 percent rate provides a moderate level of predictability for applicants. The data from these 1052 resolved cases provides a robust foundation for understanding the examiner's tendencies in this unit.

The interview lift is 17.5 percent. This 17.5 percent lift suggests that direct communication is a productive way to improve the probability of an allowance. Practitioners should consider this increase over the base allowance rate when deciding whether to request a formal discussion. The impact of interviews is a key component of the prosecution strategy for the 1052 cases resolved.

The median days to allowance is 1236. This 1236-day duration represents a consistent timeline for the examination process. Practitioners can use this 1236-day median to set expectations for the length of the prosecution cycle in Art Unit 1687. The combination of the 62.9 percent allowance rate and the 1236-day timeline provides a clear baseline for planning in Tech Center 1700.

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

Performance Statistics

63.1%
Allow Rate
-1.9% vs TC avg
1,079
Total Applications
+17.8%
Interview Lift
1237
Avg Prosecution Days
Based on 1053 resolved cases, 2023–2026

Rejection Statute Breakdown

1.5%
§101 Eligibility
38.5%
§102 Novelty
30.8%
§103 Obviousness
10.1%
§112 Clarity

Currently Pending Office Actions

App #TitleStatusAssignee
18681676 MICROFLUIDIC CHIP, AND NUCLEIC ACID EXTRACTION METHOD USING SAME AND NUCLEIC ACID EXTRACTION DEVICE COMPRISING SAME Non-Final OA BOE Technology Group Co., Ltd.
18700511 Adhesive Film for a Microfluidic Device, Microfluidic Device with Adhesive Film, and Use of an Adhesive Film for Closing an Opening of a Microfluidic Device Non-Final OA Robert Bosch GmbH
18637148 SYSTEM AND METHOD FOR DEFORMING AND ANALYZING PARTICLES Non-Final OA THE REGENTS OF THE UNIVERSITY OF CALIFORNIA
18006445 MICROFLUIDIC ELECTROCHEMICAL ANALYTE DETECTORS Final Rejection Massachusetts Institute of Technology
18702286 SYSTEMS FOR THE EXTRACTION OF MACROMOLECULES Non-Final OA WUXI BIOLOGICS IRELAND LIMITED
17968598 MICROFLUIDIC CONNECTOR GROUP, MICROFLUIDIC DEVICE AND MANUFACTURING PROCESS THEREOF, IN PARTICULAR FOR A CARTRIDGE FOR SAMPLE PREPARATION AND MOLECULE ANALYSIS Non-Final OA STMICROELECTRONICS S.r.l.
18691378 Gas-Liquid Separator, Total Organic Carbon Analyzer, and Analysis System Non-Final OA SHIMADZU CORPORATION
18570781 IMPROVED FLOW CELLS, SYSTEMS, AND METHODS Non-Final OA MGI Tech Co., Ltd.

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