Prosecution Insights
Last updated: October 27, 2026

Prem C Singh, USPTO Patent Examiner

Listed by the USPTO as SINGH, PREM C

Tech Center 1700 • Art Units: 1771 1797

This examiner grants 59% of resolved cases

Analysis

SINGH, PREM C works in Tech Center 1700 and art unit 1771. The profile records 358 resolved cases, with an allowance rate of 58.9%. Interview activity is associated with a 33.6% lift, while the median time to allowance is 1471 days. The lift provides a practical reason to consider examiner interviews when prosecution issues can be clarified directly.

The listed company portfolio includes Saudi Arabian Oil Company, TotalEnergies SE, and Chevron U.s.a. Inc. The listed firms are Boone IP Law, PLLC, DINSMORE & SHOHL LLP, and FOLEY & LARDNER LLP. Practitioners handling matters in this art unit can use these organizations as part of the profile’s prosecution context, while the allowance and timing measures help frame expectations for claim strategy and docket planning.

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

Performance Statistics

58.9%
Allow Rate
-6.1% vs TC avg
366
Total Applications
+33.6%
Interview Lift
1471
Avg Prosecution Days
Based on 358 resolved cases, 2023–2026

Rejection Statute Breakdown

0.5%
§101 Eligibility
8.7%
§102 Novelty
71.0%
§103 Obviousness
9.1%
§112 Clarity

Currently Pending Office Actions

App #TitleStatusAssignee
19040954 DIRECT CONVERSION OF PLASTIC DERIVED OIL AND LIGHT CRUDE OIL TO PRODUCE CIRCULAR CHEMICALS AND LOW CARBON FUELS Non-Final OA Saudi Arabian Oil Company
18876413 METHOD FOR THE PURIFICATION OF A PLASTIC LIQUEFACTION OIL COMPOSITION BY CAVITATION, AND USE THEREOF Non-Final OA TotalEnergies OneTech
18863213 Processes and Systems for Fractionating a Pyrolysis Effluent Non-Final OA ExxonMobil Chemical Patents Inc.

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Frequently Asked Questions

What is examiner Prem C Singh's allowance rate?

58.9% of resolved applications examined by Prem C Singh were allowed (358 resolved cases), compared with 53.8% across Art Unit 1771 over the last five years.

Does an interview help with examiner Prem C Singh?

This examiner's interview lift is +33.6 percentage points: the difference in allowance rate between resolved applications that had an examiner interview and those that did not.

How long does examiner Prem C Singh take to allow a patent?

Applications allowed by Prem C Singh took 1,471 days on average from filing to allowance.

Which art unit does examiner Prem C Singh work in?

Prem C Singh examines applications in Art Unit 1771 in Tech Center 1700 (Chemistry & Materials).

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