Examiner Tian-Pong Chang

Appears inactive Last observed office action: July 2020 (70 months ago).

Examiner Tian-Pong Chang appears to be about average relative to their peer examiners. Their lifetime grant ratio is 65.5%, they average 2.86 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 About Average

Average OA / Grant 2.86

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Examiner Details

Observed Examiner Years: 8 years (2013-2020)
Tech Center: 2100 - Computer Architecture Software and Information Security
Group: 2130 - Memory Access and Control

Metrics

Applications Evaluated: 197
Granted Applications: 129
Non-Granted Applications: 68
Avg OA / Grant: 2.86
Last OA Observed: July 2020 (70 months ago)
Art Units Seen: 2136 , 2186
Work Groups Seen: 2130 - Memory Access and Control

2180 - Computer Architecture, I/O, Modeling and Simulation

Context Comparison

Scope	Examiners	Lifetime Grant Ratio	Avg OA / Grant
This Examiner	1	65.5%	2.86
Art Unit	17	71.2%	2.38
Group	138	69.8%	2.08
Tech Center	1,706	55.9%	2.19
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 2013; examiner may not yet have been active in the available dataset.
2013	15	12	80.0%
2014	30	18	60.0%
2015	33	18	54.5%
2016	32	20	62.5%
2017	35	26	74.3%
2018	19	9	47.4%
2019	20	14	70.0%
2020	13	12	92.3%
No observed data after 2020; examiner may have gone inactive or moved out of examining work.

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

Rejection Timeline

OA #	Office Actions	§ 101 Percentage	§ 102 Percentage	§ 103 Percentage	§ 112 Percentage
1	204	0.0%	1.5%	91.7%	2.0%
2	153	3.3%	0.7%	85.0%	9.2%
3	107	1.9%	0.9%	86.9%	7.5%
4	62	3.2%	0.0%	91.9%	4.8%
5	29	3.4%	0.0%	93.1%	3.4%
6	16	0.0%	0.0%	100.0%	0.0%
7	10	0.0%	0.0%	90.0%	0.0%
8	6	0.0%	0.0%	50.0%	16.7%
9	2	0.0%	0.0%	100.0%	0.0%
10	2	0.0%	0.0%	100.0%	0.0%

§ 101 Yearly Trend

2014: Alice

2019: PEG

0.0%

2012

0.0%

2013

1.1%

2014

1.1%

2015

0.0%

2016

1.0%

2017

10.7%

2018

1.8%

2019

0.0%

2020

Each bar shows the share of this examiner's observed office actions in that year that included a § 101 rejection.