Prosecution Insights
Last updated: October 26, 2026

Assaf Zilbering, USPTO Patent Examiner

Listed by the USPTO as ZILBERING, ASSAF

Tech Center 1700 • Art Units: 1781 1792 1793

This examiner grants 35% of resolved cases

Analysis

ZILBERING, ASSAF works in Tech Center 1700 and Art Unit 1781. The profile contains 663 resolved cases and an allowance rate of 35.3%. The median time to allowance is 1523 days, making extended prosecution a central planning issue for applicants and their counsel.

The interview lift is 27.6%, indicating a meaningful association with allowance outcomes. A practitioner may use an interview to narrow the dispute and test possible claim distinctions, while preserving a detailed written record. The represented companies include The Nisshin OilliO Group, Ltd., Ketoneaid Inc., and CJ CheilJedang Corporation. The listed firms are FITCH EVEN TABIN & FLANNERY, LLP, MERCHANT & GOULD P.C., and Rankin, Hill & Clark LLP.

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

Performance Statistics

35.3%
Allow Rate
-29.7% vs TC avg
730
Total Applications
+27.6%
Interview Lift
1523
Avg Prosecution Days
Based on 663 resolved cases, 2023–2026

Rejection Statute Breakdown

1.9%
§101 Eligibility
7.9%
§102 Novelty
63.4%
§103 Obviousness
22.4%
§112 Clarity

Currently Pending Office Actions

App #TitleStatusAssignee
18539156 FAT LUMP COMPOSITION, FAT LUMP MIXTURE, MEAT ALTERNATIVE, AND METHOD OF PRODUCING FAT LUMP COMPOSITION Final Rejection FUJIFILM CORPORATION
17919145 FROZEN COOKED RICE AND METHOD FOR PREPARING THEREOF Final Rejection CJ CHEILJEDANG CORPORATION
18572400 PROCESSED FOOD PRODUCT Final Rejection SUNTORY HOLDINGS LIMITED
17601967 OIL-IN-WATER EMULSIFIED FOOD COMPOSITION WITH HIGH OLEIC OIL Non-Final OA Conopco Inc., d/b/a UNILEVER
18570050 SENSORY MODIFIERS FOR PROTEIN COMPOSITIONS Final Rejection CARGILL, INCORPORATED

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Frequently Asked Questions

What is examiner Assaf Zilbering's allowance rate?

35.3% of resolved applications examined by Assaf Zilbering were allowed (663 resolved cases), compared with 47.7% across Art Unit 1781 over the last five years.

Does an interview help with examiner Assaf Zilbering?

This examiner's interview lift is +27.6 percentage points: the difference in allowance rate between resolved applications that had an examiner interview and those that did not.

How long does examiner Assaf Zilbering take to allow a patent?

Applications allowed by Assaf Zilbering took 1,523 days on average from filing to allowance.

Which art unit does examiner Assaf Zilbering work in?

Assaf Zilbering examines applications in Art Unit 1781 in Tech Center 1700 (Chemistry & Materials).

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