Examiner Shibin Liang

Examiner Shibin Liang appears to be very difficult relative to their art unit, group, tech center, and USPTO peers. Their lifetime grant ratio is 50.0%, they average 2.47 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 About Average

Difficulty vs USPTO Very Hard

Average OA / Grant 2.47

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Examiner Details

Observed Examiner Years: 8 years (2019-2026)
Phone: (571) 272-8811
Predicted Supervisor: N/A
Supervisor Phone: N/A
Tech Center: 1700 - Chemical and Materials Engineering
Group: 1740 - Tires, Adhesive Bonding, Glass/Paper Making, Plastics Shaping and Molding

Metrics

Applications Evaluated: 474
Granted Applications: 237
Non-Granted Applications: 237
Avg OA / Grant: 2.47
Last OA Observed: March 2026 (0 months ago)
Art Units Seen: 1741
Work Groups Seen: 1740 - Tires, Adhesive Bonding, Glass/Paper Making, Plastics Shaping and Molding

Context Comparison

Scope	Examiners	Lifetime Grant Ratio	Avg OA / Grant
This Examiner	1	50.0%	2.47
Art Unit	26	56.8%	2.01
Group	195	53.9%	2.05
Tech Center	1,713	47.3%	2.14
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 2019; examiner may not yet have been active in the available dataset.
2019	17	6	35.3%
2020	54	30	55.6%
2021	80	54	67.5%
2022	70	57	81.4%
2023	71	36	50.7%
2024	67	41	61.2%
2025	85	13	15.3%
2026	30	0	0.0%

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

Rejection Timeline

OA #	Office Actions	§ 101 Percentage	§ 102 Percentage	§ 103 Percentage	§ 112 Percentage
1	469	0.0%	6.6%	90.8%	1.5%
2	339	0.0%	5.9%	92.9%	0.6%
3	206	0.0%	5.3%	93.7%	0.5%
4	116	0.0%	3.4%	93.1%	2.6%
5	57	0.0%	3.5%	94.7%	0.0%
6	22	0.0%	0.0%	100.0%	0.0%
7	7	0.0%	0.0%	100.0%	0.0%
8	5	0.0%	0.0%	100.0%	0.0%
9	2	0.0%	0.0%	100.0%	0.0%