Examiner Kevin Guanhua Wen

Examiner Kevin Guanhua Wen appears to be very difficult relative to their art unit, group, tech center, and USPTO peers. Their lifetime grant ratio is 39.6%, they average 2.30 office actions per granted patent, and their rejection profile is dominated by §103.

Difficulty vs AU Very Hard

Difficulty vs Group Very Hard

Difficulty vs TC Very Hard

Difficulty vs USPTO Very Hard

Average OA / Grant 2.30

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Examiner Details

Observed Examiner Years: 6 years (2021-2026)
Phone: (571) 272-9940
Predicted Supervisor: N/A
Supervisor Phone: N/A
Tech Center: 3700 - Mechanical Engineering, Manufacturing and Products
Group: 3760 - Refrigeration, Vaporization, Ventilation, and Combustion

Metrics

Applications Evaluated: 255
Granted Applications: 101
Non-Granted Applications: 154
Avg OA / Grant: 2.30
Last OA Observed: March 2026 (2 months ago)
Art Units Seen: 3761
Work Groups Seen: 3760 - Refrigeration, Vaporization, Ventilation, and Combustion

Context Comparison

Scope	Examiners	Lifetime Grant Ratio	Avg OA / Grant
This Examiner	1	39.6%	2.30
Art Unit	80	40.8%	2.17
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 2021; examiner may not yet have been active in the available dataset.
2021	4	2	50.0%
2022	39	20	51.3%
2023	57	40	70.2%
2024	42	33	78.6%
2025	68	6	8.8%
2026	45	0	0.0%

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

Rejection Timeline

OA #	Office Actions	§ 101 Percentage	§ 102 Percentage	§ 103 Percentage	§ 112 Percentage
1	245	0.0%	0.0%	98.8%	0.0%
2	161	0.0%	0.6%	98.8%	0.6%
3	71	0.0%	0.0%	100.0%	0.0%
4	32	0.0%	0.0%	96.9%	0.0%
5	10	0.0%	0.0%	100.0%	0.0%
6	1	0.0%	0.0%	100.0%	0.0%