Prosecution Insights
Last updated: October 27, 2026

Marriah C G Ellington, USPTO Patent Examiner

Listed by the USPTO as ELLINGTON, MARRIAH C G

Tech Center 1700 • Art Units: 1773

This examiner grants 50% of resolved cases

Analysis

ELLINGTON, MARRIAH C G works in tech center 1700 and art unit 1773. The profile contains 32 resolved cases, an allowance rate of 50.0%, and a median of 1265 days to allowance. Interviews are associated with a 31.4% lift in the allowance rate.

The limited record shows equal measured allowance and non-allowance outcomes, while the median timeline supports planning for prolonged prosecution. Counsel should approach examination with clear fallback positions and a response plan that accounts for claim negotiation. The interview lift supports evaluating a direct discussion where technical details or claim amendments are central to the dispute.

Sumitomo Electric Industries Ltd., Cytiva, and King Abdullah University of Science and Technology are the leading companies. AMPACC Law Group PLLC, Barnes & Thornburg LLP (IN), and DeLio Peterson & Curcio LLC are the leading firms. These names provide context for practitioner review.

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

Performance Statistics

50.0%
Allow Rate
-15.0% vs TC avg
59
Total Applications
+31.4%
Interview Lift
1265
Avg Prosecution Days
Based on 32 resolved cases, 2023–2026

Rejection Statute Breakdown

1.4%
§101 Eligibility
14.2%
§102 Novelty
44.3%
§103 Obviousness
39.2%
§112 Clarity

Currently Pending Office Actions

App #TitleStatusAssignee
18728176 POROUS MEMBRANE AND POROUS MEMBRANE LAMINATE Non-Final OA SUMITOMO ELECTRIC INDUSTRIES, LTD.
17921202 ANAEROBIC MEMBRANE BIOREACTOR COUPLED WITH UV ADVANCED DISINFECTION PROCESS FOR WASTEWATER TREATMENT Final Rejection KING ABDULLAH UNIVERSITY OF SCIENCE AND TECHNOLOGY

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Frequently Asked Questions

What is examiner Marriah C G Ellington's allowance rate?

50.0% of resolved applications examined by Marriah C G Ellington were allowed (32 resolved cases), compared with 51.4% across Art Unit 1773 over the last five years.

Does an interview help with examiner Marriah C G Ellington?

This examiner's interview lift is +31.4 percentage points: the difference in allowance rate between resolved applications that had an examiner interview and those that did not.

How long does examiner Marriah C G Ellington take to allow a patent?

Applications allowed by Marriah C G Ellington took 1,265 days on average from filing to allowance.

Which art unit does examiner Marriah C G Ellington work in?

Marriah C G Ellington examines applications in Art Unit 1773 in Tech Center 1700 (Chemistry & Materials).

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