Examiner Chang Charles S

2871-CHANG-CHARLES-S

Employment Information

Art Unit:2871 — Liquid crystal cells, elements and systems
Group:2870-2880 — Optics/Photocopying
Classes: 349 — Liquid crystal cells, elements and systems
359 — Optical: systems and elements
257 — Active solid-state devices (e.g., transistors, solid-state diodes)
362 — Illumination
361 — Electricity: electrical systems and devices
312 — Supports: cabinet structure
345 — Computer graphics processing and selective visual display systems
315 — Electric lamp and discharge devices: systems
705 — Data processing: financial, business practice, management, or cost/price determination
428 — Stock material or miscellaneous articles
Phone:Available with subscription
Email:Available with subscription
Title:Pat Examnr Elctrl Engrg
Service:19 years
Grade:GS-14

Grant Rate and Difficulty Ranking

31
3-Year Grant rate: 86% over 475 cases
Difficulty: Easier
Difficulty Percentile: 31st

With Examiner Chang, you have a 86% chance of getting an issued patent by 3 years after the first office action. Examiner Chang is an easier examiner and in the 31st percentile across all examiners (with 100th percentile most difficult).

Grant Rate

Grant Rate Timeline

Below is the grant rate timeline for Examiner Chang, where the timeline is relative to the date of the first office action. The three-year grant rate is the percentage of applications granted at three years after the first office action.

Comparison with Art Unit 2871

Examiner Chang's grant rate is higher than that of Art Unit 2871 and higher than that of the USPTO.

Average Office Actions Per Grant
Examiner Chang 1.1
Art Unit 2871 1.3

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Recent Dispositions

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Appeals Statistics

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Appeal History

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Disclaimer: We do not provide any guarantees as to the accuracy of the statistics presented above and under
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