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Patent examiner

Chuck Y Mah

ActiveArt unit 3677Tech center 36001,801 applicationsEasier than peers

Art unit3677 36 examiners
Tech center3600
Active in the record2007 to 2026, 20 years
Applications examined1,801 1,501 allowed, 262 abandoned, 38 pending
Main domainsE05D, E05F, G06F
DifficultyP10 in the tech center, P10 of all examiners
3-year grant rate
85%
+16 pts vs art unit 3677 allowed within 3 years of the first action
Allowance rate
85%
+15 pts vs art unit 3677 range 83% to 87%
Rejections before allowance
0.9
−0.5 vs art unit 3677
Months to first action
13.6 mo
−3.3 vs art unit 3677

In plain words

With Chuck Y Mah, 85% of applications were allowed within three years of the first office action, against 69% for art unit 3677. Chuck Y Mah is an easier examiner than the art unit average, in the 10th percentile of all examiners by difficulty (the 100th is the hardest). The first action takes 13.6 months on average.

Easier10th percentileHarder
Difficulty percentile across all examiners

Examiner difficulty

How hard is this examiner?

Every examiner with enough decided cases, from the hardest to the easiest; the dashed line is this examiner. Switch the comparison set or the measure, and click a bar to see who is in it: the examiners you might have drawn instead.

Timeline

Applications by filing year: drag across the years to study a period

Allowed in green, abandoned in red, pending in grey. The figures above and every chart that can be recomputed by filing year follow the span you pick; the rest are marked all years.

Ask the record

Questions practitioners ask, answered from 1,801 applications

Grant rate from the first action

Share allowed, by months after the first office action

The gold line is this record and the blue line is art unit 3677. The marker is the three-year grant rate.

Outcome simulator

Where you are, what you do next, and the odds that follow

A model of this record’s own transitions: each examiner action, the response to it, and what came next. Thin data borrows from art unit 3677.

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Prosecution paths

How prosecution actually unfolds

Every application’s sequence of examiner actions, from the first action to the outcome. Hover a band for the count.

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Compared with peers

Against the art unit, the tech center and the USPTO

The same figures for this record, art unit 3677, the tech center and the whole office.

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Allowance over time

How fast applications are allowed, or abandoned

Share allowed (gold) and abandoned (red) by month since filing, with pending cases counted only while they are pending.

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Rejection fingerprint

What gets rejected, by statute

Share of office actions raising each ground; blue is art unit 3677.

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After a response

Which grounds this examiner withdraws

How often each ground is gone from the next action once you have responded to it.

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What works

Allowance by strategy used

Allowance rate among decided cases where each move was used at least once, against art unit 3677.

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Interviews

Does an interview help?

Allowance with and without an examiner interview, and how often interviews happen.

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Odds by round

Chance the next action is an allowance

After the first, second and later rejections.

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Response clock

Days from a response to the next action

How long the examiner takes to act once you have answered.

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Quarter-end timing

When allowances land in the fiscal quarter

Allowances by week of the USPTO fiscal quarter. An even spread would put 15% in the last two weeks.

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Appeals

What happens on appeal

Appeals filed, briefs, examiner’s answers, and how the Board decided.

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Trend

Allowance rate by filing year

Is it getting easier or harder? Gold is this record, blue is art unit 3677.

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Who files here

Assignees and firms with the most applications

How often each one was allowed with this examiner.

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Cited art

References this examiner relies on most

From the rejections and the examiner’s citation forms.

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Landscape

Where Chuck Y Mah sits in tech center 3600

Each dot is an examiner: allowance rate across, rejections before allowance down, size by caseload. Click one to open it.

Applications

Every application examined

ApplicationTitleFiledStatusRejectionsRCEsTo 1st action
19409134HINGE ASSEMBLY WITH LOCKING MECHANISM FOR LID AND CONTAINER ENGAGEMENT2025-12-04Pending00n/a
19406128CENTER HINGE AND REFRIGERATOR HAVING THE CENTER HINGE2025-12-02Pending00n/a
19484974FORCE STABILIZATION DEVICE2025-11-17Pending00n/a
15324815Method and apparatus for adaptive signal processing2012-01-10Allowed1012.0 mo
15341124Composition and method for controlled release2015-02-11Abandoned4123.0 mo
15421966Distributed ledger transaction verification2018-03-12Allowed3020.0 mo
15890438Thermal management of battery assemblies2021-04-13Pending2117.0 mo
15647952Machine learning model for anomaly detection2012-05-14Allowed1014.0 mo
15308190Wireless power transfer coil arrangement2015-06-15Abandoned4125.0 mo
15956520Catalyst for selective hydrogenation2018-07-16Allowed3022.0 mo
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