Patent AnalyticsExaminers
Menu

Patent examiner

Christen A Kurien

ActiveArt unit 2421Tech center 2400495 applicationsHarder than peers

Art unit2421 28 examiners
Tech center2400
Active in the record2008 to 2026, 18 years
Applications examined495 303 allowed, 159 abandoned, 33 pending
Main domainsH04N, G06Q, G06F
DifficultyP78 in the tech center, P79 of all examiners
3-year grant rate
55%
−19 pts vs art unit 2421 allowed within 3 years of the first action
Allowance rate
66%
−13 pts vs art unit 2421 range 61% to 70%
Rejections before allowance
2.5
+0.6 vs art unit 2421
Months to first action
14.5 mo
+1.4 vs art unit 2421

In plain words

With Christen A Kurien, 55% of applications were allowed within three years of the first office action, against 73% for art unit 2421. Christen A Kurien is a harder examiner than the art unit average, in the 79th percentile of all examiners by difficulty (the 100th is the hardest). The first action takes 14.5 months on average.

Easier79th 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 495 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 2421. 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 2421.

Unlock the outcome simulatorIncluded in Pro, from $29 a month. Cancel any time.

See plans Sign in

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.

Unlock the prosecution pathsIncluded in Pro, from $29 a month. Cancel any time.

See plans Sign in

Compared with peers

Against the art unit, the tech center and the USPTO

The same figures for this record, art unit 2421, the tech center and the whole office.

Unlock the peer comparisonIncluded in Pro, from $29 a month. Cancel any time.

See plans Sign in

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.

Unlock the allowance curveIncluded in Pro, from $29 a month. Cancel any time.

See plans Sign in

Rejection fingerprint

What gets rejected, by statute

Share of office actions raising each ground; blue is art unit 2421.

Unlock the rejection fingerprintIncluded in Pro, from $29 a month. Cancel any time.

See plans Sign in

After a response

Which grounds this examiner withdraws

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

Unlock the withdrawal ratesIncluded in Pro, from $29 a month. Cancel any time.

See plans Sign in

What works

Allowance by strategy used

Allowance rate among decided cases where each move was used at least once, against art unit 2421.

Unlock what works hereIncluded in Pro, from $29 a month. Cancel any time.

See plans Sign in

Interviews

Does an interview help?

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

Unlock the interview benefitIncluded in Pro, from $29 a month. Cancel any time.

See plans Sign in

Odds by round

Chance the next action is an allowance

After the first, second and later rejections.

Unlock the odds by roundIncluded in Pro, from $29 a month. Cancel any time.

See plans Sign in

Response clock

Days from a response to the next action

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

Unlock the response clockIncluded in Pro, from $29 a month. Cancel any time.

See plans Sign in

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.

Unlock the quarter timingIncluded in Pro, from $29 a month. Cancel any time.

See plans Sign in

Appeals

What happens on appeal

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

Unlock the appeal statisticsIncluded in Pro, from $29 a month. Cancel any time.

See plans Sign in

Trend

Allowance rate by filing year

Is it getting easier or harder? Gold is this record, blue is art unit 2421.

Unlock the trendIncluded in Pro, from $29 a month. Cancel any time.

See plans Sign in

Who files here

Assignees and firms with the most applications

How often each one was allowed with this examiner.

Unlock who files hereIncluded in Pro, from $29 a month. Cancel any time.

See plans Sign in

Cited art

References this examiner relies on most

From the rejections and the examiner’s citation forms.

Unlock the cited artIncluded in Pro, from $29 a month. Cancel any time.

See plans Sign in

Landscape

Where Christen A Kurien sits in tech center 2400

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
19535718COMPUTING NETWORK FOR SYNCHRONIZED STREAMING OF AUDIOVISUAL CONTENT2026-02-10Allowed101.7 mo
19493182INFORMATION PROCESSING APPARATUS, INFORMATION PROCESSING METHOD, AND NON-TRANSITORY…2025-12-15Pending00n/a
19412454CONTROL APPARATUS AND METHOD, IMAGE STABILIZATION APPARATUS, IMAGE CAPTURING APPARA…2025-12-08Pending00n/a
15368511Method and apparatus for adaptive signal processing2012-01-10Allowed1012.0 mo
15308901Composition and method for controlled release2015-02-11Abandoned4123.0 mo
15637147Distributed ledger transaction verification2018-03-12Allowed3020.0 mo
15817097Thermal management of battery assemblies2021-04-13Pending2117.0 mo
15183891Machine learning model for anomaly detection2012-05-14Allowed1014.0 mo
15165428Wireless power transfer coil arrangement2015-06-15Abandoned4125.0 mo
15249711Catalyst for selective hydrogenation2018-07-16Allowed3022.0 mo
Unlock all 495 applications, each with its full timelineIncluded in Pro, from $29 a month. Cancel any time.

See plans Sign in