Prosecution Insights
Last updated: October 02, 2026

Examiner: MARCSISIN, ELLEN JEAN

Tech Center 1700 • Art Units: 1600 1625 1641 1645 1674 1677 1678 1758

This examiner grants 34% of resolved cases

Analysis

Ellen Jean Marcsisin has resolved 365 cases in Art Unit 1600 of Tech Center 1700. Her allowance rate is 34.5 percent. This percentage is a primary metric for practitioners to consider when evaluating the examiner's history. The data also shows an interview lift of 49.3 percent. This 49.3 percent lift indicates the change in allowance probability associated with an interview.

The median days to allowance is 3561. This 3561-day figure represents the duration of the prosecution process for cases that reach a grant. Practitioners should consider the 365 resolved cases as a historical record of the examiner's work. The 34.5 percent allowance rate and 49.3 percent interview lift are components of the examination profile. The median pendency is a factor for managing client expectations.

Direct communication is a documented tactic, as shown by the lift. Applicants should review the allowance rate as they prepare their prosecution strategy. The cases provide a data set for understanding the examiner's approach in Tech Center 1700. The timeline is a measure of the time required to navigate Art Unit 1600 to a successful conclusion.

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

Performance Statistics

34.5%
Allow Rate
-30.5% vs TC avg
409
Total Applications
+49.3%
Interview Lift
3561
Avg Prosecution Days
Based on 365 resolved cases, 2023–2026

Rejection Statute Breakdown

12.0%
§101 Eligibility
9.3%
§102 Novelty
35.2%
§103 Obviousness
29.4%
§112 Clarity

Currently Pending Office Actions

App #TitleStatusAssignee
18617851 IMMUNOCHROMATOGRAPHY KIT AND ASSAY APPARATUS Non-Final OA FUJIFILM Corporation
18044371 SYSTEMS AND METHODS FOR THE AMPLIFIED DETECTION OF MOLECULES ON MICROPARTICLES Final Rejection THE REGENTS OF THE UNIVERSITY OF CALIFORNIA
18004402 SINGLE-MOLECULE, REAL-TIME, LABEL-FREE DYNAMIC BIOSENSING WITH NANOSCALE MAGNETIC FIELD SENSORS Final Rejection Western Digital Technologies, Inc.
18604573 METHODS FOR OBTAINING ANTIBODY MOLECULES WITH HIGH AFFINITY Non-Final OA Regeneron Pharmaceuticals, Inc.
16880736 METHODS FOR IDENTIFYING AND QUANTITATING HOST CELL PROTEIN Non-Final OA Regeneron Pharmaceuticals, Inc.
18300689 ELECTROCHEMILUMINESCENCE METHOD OF DETECTING AN ANALYTE IN A LIQUID SAMPLE AND ANALYSIS SYSTEM Non-Final OA Hitachi High-Tech Corporation
18334135 TRANS-INTERFACIAL MAGNETIC SEPARATION Non-Final OA Northwestern University
17891458 IDENTIFICATION OF PATIENTS WITH ABNORMAL FRACTIONAL SHORTENING Final Rejection Roche Diagnostics Operations, Inc.
17162140 Use of Biomarkers in the Assessment of the Early Transition from Arterial Hypertension to Heart Failure Final Rejection Roche Diagnostics Operations, Inc.
16625282 QUANTIFICATION, ISOLATION, AND CHARACTERIZATION OF EXOSOMES USING DROPLET-BASED AND WELL-BASED MICROFLUIDIC SYSTEMS Final Rejection THE HONG KONG UNIVERSITY OF SCIENCE AND TECHNOLOGY
18424571 METHOD FOR THE DETECTION OF ORGAN DERIVED EXTRACELLULAR VESICLES Non-Final OA Hoffmann-La Roche Inc.
18472987 COMPOSITION FOR PREVENTING OR TREATING OF ISCHEMIC CEREBROVASCULAR DISEASE COMPRISING AN ARGINASE-1 INHIBITOR Non-Final OA Ajou University Industry-Academic Cooperation Foundation
18145873 SYSTEMS AND METHODS FOR DETECTION OF LAMININ BETA-1 SUBUNIT WITHIN TISSUE Non-Final OA Axogen Corporation
17821835 Method of Antigen-Binding Protein Production Non-Final OA AMGEN INC.
18841308 ANTI-PEG ANTIBODY BINDING MATERIAL AND METHOD FOR DETECTING ANTI-PEG ANTIBODY Non-Final OA DKS Co. Ltd.
14663560 BIOASSAY SYSTEM AND METHOD FOR DETECTING ANALYTES IN BODY FLUIDS Final Rejection INSTRUMENTATION LABORATORY COMPANY
17051278 METHODS AND COMPOSITIONS FOR POINT OF CARE MEASUREMENT OF THE BIOAVAILABILITY OF THERAPEUTIC BIOLOGICS Final Rejection GENALYTE, INC.

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