Examiner Christopher D. Koharski

Appears inactive Last observed office action: September 2020 (68 months ago).

Examiner Christopher D. Koharski appears to be very easy relative to their art unit, group, tech center, and USPTO peers. Their lifetime grant ratio is 74.6%, they average 1.91 office actions per granted patent, and their rejection profile is dominated by §103.

Difficulty vs AU Very Easy

Difficulty vs Group Very Easy

Difficulty vs TC Very Easy

Difficulty vs USPTO Very Easy

Average OA / Grant 1.91

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Examiner Details

Observed Examiner Years: 13 years (2008-2020)
Tech Center: 3700 - Mechanical Engineering, Manufacturing and Products
Group: 3760 - Refrigeration, Vaporization, Ventilation, and Combustion

Metrics

Applications Evaluated: 354
Granted Applications: 264
Non-Granted Applications: 90
Avg OA / Grant: 1.91
Last OA Observed: September 2020 (68 months ago)
Art Units Seen: 3763 , 3766 , 3792 , 3793 , 3797
Work Groups Seen: 3760 - Refrigeration, Vaporization, Ventilation, and Combustion

3790 - Medical Instruments, Diagnostic Equipment, and Treatment Devices

Context Comparison

Scope	Examiners	Lifetime Grant Ratio	Avg OA / Grant
This Examiner	1	74.6%	1.91
Art Unit	98	55.4%	2.09
Group	377	50.6%	2.11
Tech Center	2,632	49.9%	2.01
USPTO	16,116	54.8%	1.98

Grant Timeline

Shaded region marks the last two observed years, where grant outcomes may lag due to recency.

Year	Applications	Granted	Grant Rate
No observed data before 2008; examiner may not yet have been active in the available dataset.
2008	65	44	67.7%
2009	91	67	73.6%
2010	63	44	69.8%
2011	88	73	83.0%
2012	38	32	84.2%
No observed data for 2013.
2014	1	1	100.0%
No observed data for 2015.
2016	1	0	0.0%
No observed data for 2017-2018.
2019	5	3	60.0%
2020	2	0	0.0%
No observed data after 2020; examiner may have gone inactive or moved out of examining work.

264 family-cache-validated grants; 0 OA-only grant signals.

Rejection Timeline

OA #	Office Actions	§ 101 Percentage	§ 102 Percentage	§ 103 Percentage	§ 112 Percentage
1	356	0.0%	16.6%	80.6%	0.0%
2	184	0.0%	10.3%	83.2%	1.6%
3	57	0.0%	1.8%	91.2%	5.3%
4	28	0.0%	10.7%	78.6%	0.0%
5	7	0.0%	0.0%	100.0%	0.0%
6	3	0.0%	0.0%	100.0%	0.0%
10	1	0.0%	0.0%	0.0%	0.0%