Prosecution Insights
Last updated: October 27, 2026

Nissa M Westerberg, USPTO Patent Examiner

Listed by the USPTO as WESTERBERG, NISSA M

Tech Center 4100 • Art Units: 1618 4100

This examiner grants 23% of resolved cases

Analysis

WESTERBERG, NISSA M is assigned to Tech Center 4100 and Art Unit 1618. Her record includes 913 resolved cases, an allowance rate of 23.4%, and a median of 1569 days to allowance. The 37.3% interview lift is strongly positive in this record, indicating that interviews may materially improve outcomes even though the overall allowance rate remains low.

The listed companies are California Institute of Technology, Curium US LLC, and University of Florida Research Foundation Inc. The listed firms are POLSINELLI PC (Main Customer Number), Advent, LLP, and Anderson Patent Law Firm LLC. Practitioners should treat interview preparation as a central part of prosecution, particularly where claim construction or technical distinctions can be explained directly. The 1569-day median also supports early attention to compact prosecution and amendment strategy.

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

Performance Statistics

23.4%
Allow Rate
-36.6% vs TC avg
989
Total Applications
+37.3%
Interview Lift
1569
Avg Prosecution Days
Based on 913 resolved cases, 2023–2026

Rejection Statute Breakdown

1.8%
§101 Eligibility
9.2%
§102 Novelty
42.5%
§103 Obviousness
28.7%
§112 Clarity

Currently Pending Office Actions

App #TitleStatusAssignee
17906508 DEUTERIUM MAGNETIC RESONANCE IMAGING Non-Final OA University of Florida Research Foundation, Inc.
18797888 Octreotide Depot Formulation with Constantly High Exposure Levels Non-Final OA Novartis AG
17795143 FLUORESCENT SILICA NANOPARTICLES AND METHOD FOR MANUFACTURING FLUORESCENT SILICA NANOPARTICLES Non-Final OA Konica Minolta, Inc.
18424697 STEREOCOMPLEX OF OLIGOLACTIC ACID CONJUGATES IN MICELLES FOR IMPROVED PHYSICAL STABILITY AND ENHANCED ANTITUMOR EFFICACY Non-Final OA Wisconsin Alumni Research Foundation
19345876 IMPROVED LOCAL ANESTHETIC SOLUTION FOR DENTAL AND/OR CONTRAST MEDIA USE Final Rejection Neocaine, LLC
17308599 CATIONIC MUCIC ACID POLYMER-BASED DELIVERY SYSTEMS Final Rejection California Institute Of Technology
17092215 REMOTE-CONTROLLED IMAGE-GUIDED DRUG DELIVERY VIA ULTRASOUND-MODULATED MOLECULAR DIFFUSION Non-Final OA California Institute of Technology
17445285 ENHANCING SUBCUTANEOUS INJECTION AND TARGET TISSUE ACCUMULATION OF NANOPARTICLES VIA CO-ADMINISTRATION WITH MACROPINOCYTOSIS INHIBITORY NANOPARTICLES (MINP) Final Rejection Northwestern University
18550964 COMPOUNDS TARGETING FIBROBLAST-ACTIVATION PROTEIN AND METHODS OF USE THEREOF Non-Final OA Purdue Research Foundation
18551786 ORAL DELIVERY OF SILICA/ALUMINOSILICATE NANOPARTICLES Non-Final OA Cornell University
18166390 METHODS AND COMPOSITION FOR DYE-BASED ENCODING AND QUANTIFICATION Final Rejection ARIZONA BOARD OF REGENTS ON BEHALF OF THE UNIVERSITY OF ARIZONA
17403157 COSMETIC COMPOSITIONS Final Rejection L'Oreal
18904575 Compositions and Methods for Targeting Lipid Nanoparticle Therapeutics to Stem Cells Final Rejection The Trustees of the University of Pennsylvania
17606226 COMPOSITIONS AND METHODS OF IMMUNODEPLETION FOR THE TREATMENT OF MALIGNANT AND NON-MALIGNANT HEMATOLOGICAL DISEASES Non-Final OA ACTINIUM PHARMACEUTICALS, INC.
18031760 PROCESSES FOR SYNTHESIS OF ALPHA-EMITTING RADIOPHARMACEUTICALS Non-Final OA UNIVERSITY OF IOWA RESEARCH FOUNDATION
18445604 Formulated and/or Co-Formulated Liposome Compositions Containing Toll-Like Receptor ("TLR") Agonist Prodrugs Useful In The Treatment of Cancer and Methods Thereof C Final Rejection Nammi Therapeutics, Inc.
18040021 ALPHA RADIOLABELED GASTRIN ANALOGUE AND USE THEREOF IN METHODS OF TREATING CCKB RECEPTOR POSITIVE DISEASES Non-Final OA Paul Scherrer Institut
18570180 Contrast agent for magnetic resonance imaging Non-Final OA Betavist GmbH

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Frequently Asked Questions

What is examiner Nissa M Westerberg's allowance rate?

23.4% of resolved applications examined by Nissa M Westerberg were allowed (913 resolved cases), compared with 33.1% across Art Unit 1618 over the last five years.

Does an interview help with examiner Nissa M Westerberg?

This examiner's interview lift is +37.3 percentage points: the difference in allowance rate between resolved applications that had an examiner interview and those that did not.

How long does examiner Nissa M Westerberg take to allow a patent?

Applications allowed by Nissa M Westerberg took 1,569 days on average from filing to allowance.

Which art unit does examiner Nissa M Westerberg work in?

Nissa M Westerberg examines applications in Art Unit 1618 in Tech Center 4100.

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