Prosecution Insights
Last updated: October 26, 2026

Sydney Van Druff, USPTO Patent Examiner

Listed by the USPTO as VAN DRUFF, SYDNEY

Tech Center 1600 • Art Units: 1643

This examiner grants 55% of resolved cases

Analysis

VAN DRUFF, SYDNEY has 152 resolved cases in tech center 1600 and art unit 1643. The allowance rate is 55.3%, the interview lift is 32.0%, and the median time to allowance is 1155 days. The record shows allowance in a modest majority of resolved matters. Interviews are associated with a meaningful improvement relative to that outcome, while the median indicates prosecution that can extend beyond three years.

The principal companies are Novartis AG, AbbVie Inc., and Genentech Inc. The leading firms are Adams & Reese LH, ARENTFOX SCHIFF LLP, and Bennett Jones LLP. Counsel may want to prepare carefully for examiner interviews while maintaining a response plan capable of handling a prolonged biotechnology prosecution cycle.

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

Performance Statistics

55.3%
Allow Rate
-4.7% vs TC avg
189
Total Applications
+32.0%
Interview Lift
1155
Avg Prosecution Days
Based on 152 resolved cases, 2023–2026

Rejection Statute Breakdown

3.2%
§101 Eligibility
14.3%
§102 Novelty
36.7%
§103 Obviousness
25.5%
§112 Clarity

Currently Pending Office Actions

App #TitleStatusAssignee
18044405 GALACTOSYLATED DENDRIMERS FOR TARGETED INTRACELLULAR DELIVERY TO HEPATOCYTES Non-Final OA The Johns Hopkins University
17775198 IDENTIFICATION OF SPLICING-DERIVED ANTIGENS FOR TREATING CANCER Non-Final OA THE REGENTS OF THE UNIVERSITY OF CALIFORNIA

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Frequently Asked Questions

What is examiner Sydney Van Druff's allowance rate?

55.3% of resolved applications examined by Sydney Van Druff were allowed (152 resolved cases), compared with 41.5% across Art Unit 1643 over the last five years.

Does an interview help with examiner Sydney Van Druff?

This examiner's interview lift is +32.0 percentage points: the difference in allowance rate between resolved applications that had an examiner interview and those that did not.

How long does examiner Sydney Van Druff take to allow a patent?

Applications allowed by Sydney Van Druff took 1,155 days on average from filing to allowance.

Which art unit does examiner Sydney Van Druff work in?

Sydney Van Druff examines applications in Art Unit 1643 in Tech Center 1600 (Biotechnology & Pharmaceuticals).

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