Prosecution Insights
Last updated: October 27, 2026

Chih Cheng G Kao, USPTO Patent Examiner

Listed by the USPTO as KAO, CHIH CHENG G

Tech Center 2800 • Art Units: 2882 2884

This examiner grants 83% of resolved cases

Analysis

Chih Cheng G. Kao manages a large volume of 1207 resolved cases in Tech Center 2800 and Art Unit 2882. The examiner has a high allowance rate of 82.7 percent, which is very favorable for applicants. Top companies include Siemens Healthineers AG, Hologic Inc., and Eos Imaging, with firms like HARNESS, DICKEY & PIERCE, P.L.C., MAIER & MAIER, PLLC, and Merchant & Gould Hologic frequently appearing.

The median days to allowance is 916, showing a relatively efficient timeframe for the grant process. An interview lift of 9.5 percent suggests that while interviews are helpful, the examiner is generally inclined toward allowance even without them. This combination of high volume and a high allowance rate indicates an efficient and favorable prosecution environment. Practitioners can expect a predictable path to grant, with interviews serving as a useful tool for resolving any minor issues that may arise during the examination process.

Written from this page's own data; every figure is computed from USPTO records and verified before publication.

Performance Statistics

82.7%
Allow Rate
+14.7% vs TC avg
1,239
Total Applications
+9.5%
Interview Lift
916
Avg Prosecution Days
Based on 1207 resolved cases, 2023–2026

Rejection Statute Breakdown

3.7%
§101 Eligibility
21.5%
§102 Novelty
46.2%
§103 Obviousness
20.8%
§112 Clarity

Currently Pending Office Actions

App #TitleStatusAssignee
18948019 METHOD FOR SCANNING A COMPONENT Non-Final OA ROLLS-ROYCE plc
19048748 ANALYSIS METHOD Non-Final OA CANON KABUSHIKI KAISHA
18024865 MONITORING OF X-RAY TUBE Final Rejection KONINKLIJKE PHILIPS N.V.
18902729 TEMPERATURE MONITORING Non-Final OA Lam Research Corporation
18961548 MODULE CARRIER FOR A CT DETECTOR MODULE, CT DETECTOR MODULE AND CT DEVICE Non-Final OA Siemens Healthineers AG
18791884 X-RAY HIGH-VOLTAGE GENERATOR WITH AN OSCILLATING HEAT PIPE Final Rejection Siemens Healthineers AG
18936386 CONFIGURABLE PHANTOM FOR END-TO-END VERIFICATION OF ADAPTIVE RADIOTHERAPY SYSTEMS Non-Final OA VANDERBILT UNIVERSITY
19183008 BREAST COMPRESSION PADDLE WITH ACCESS CORNERS Non-Final OA Hologic, Inc.
18928484 SYSTEMS AND METHODS FOR GUIDING A PATIENT DURING IMAGING PROCEDURES Non-Final OA Hologic, Inc.
18870099 EUV MASK INSPECTION APPARATUS AND METHOD THROUGH ILLUMINATION CONTROL Non-Final OA IUCF-HYU (INDUSTRY-UNIVERSITY COOPERATION FOUNDATION HANYANG UNIVERSITY)
18770739 OPTICAL GAS SENSOR DEVICE AND MANUFACTURING METHOD OF OPTICAL GAS SENSOR DEVICE Non-Final OA MITSUMI ELECTRIC CO., LTD.
18232418 DESIGN FOR FIELD EMITTER X-RAY SOURCE RELIABILITY Non-Final OA X-SIGHT INCORPORATED

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Who Appears Before This Examiner

Top companies before this examiner

Law firms appearing most often

Frequently Asked Questions

What is examiner Chih Cheng G Kao's allowance rate?

82.7% of resolved applications examined by Chih Cheng G Kao were allowed (1,207 resolved cases), compared with 72.8% across Art Unit 2882 over the last five years.

Does an interview help with examiner Chih Cheng G Kao?

This examiner's interview lift is +9.5 percentage points: the difference in allowance rate between resolved applications that had an examiner interview and those that did not.

How long does examiner Chih Cheng G Kao take to allow a patent?

Applications allowed by Chih Cheng G Kao took 916 days on average from filing to allowance.

Which art unit does examiner Chih Cheng G Kao work in?

Chih Cheng G Kao examines applications in Art Unit 2882 in Tech Center 2800 (Semiconductors, Circuits & Optics).

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