Prosecution Insights
Last updated: October 26, 2026

Christopher L Cook, USPTO Patent Examiner

Listed by the USPTO as COOK, CHRISTOPHER L

Tech Center 3700 • Art Units: 3737 3771 3793 3797

This examiner grants 48% of resolved cases

Analysis

COOK, CHRISTOPHER L is assigned to art unit 3737 in Tech Center 3700. The record contains 566 resolved cases, an allowance rate of 47.5%, and a median of 1676 days to allowance. Interviews are associated with a 25.7% lift. The data show an allowance rate below one-half, a positive interview relationship, and the longest median prosecution period reported in this profile.

The principal companies are Canon Inc., Koninklijke Philips N.V., and GE Precision Healthcare LLC. The firms are OBLON, MCCLELLAND, MAIER & NEUSTADT, L.L.P., HARNESS, DICKEY & PIERCE, P.L.C., and Knobbe, Martens, Olson & Bear, LLP. These entities provide useful targets for related file-history research.

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

Performance Statistics

47.5%
Allow Rate
-22.5% vs TC avg
610
Total Applications
+25.7%
Interview Lift
1676
Avg Prosecution Days
Based on 566 resolved cases, 2023–2026

Rejection Statute Breakdown

4.5%
§101 Eligibility
8.8%
§102 Novelty
43.3%
§103 Obviousness
34.4%
§112 Clarity

Currently Pending Office Actions

App #TitleStatusAssignee
19029239 ULTRASOUND DIAGNOSTIC APPARATUS AND PROGRAM Final Rejection FUJIFILM Corporation
19368109 ULTRASONIC DIAGNOSTIC APPARATUS Non-Final OA Canon Kabushiki Kaisha
19324359 MEDICAL IMAGE PROCESSING APPARATUS Non-Final OA Canon Kabushiki Kaisha
19060134 ELECTRONIC DEVICE, MEDICAL INSTRUMENT, AND ULTRASONIC DIAGNOSTIC APPARATUS Final Rejection CANON KABUSHIKI KAISHA
19224038 MEDICAL DEVICES WITH ENHANCED ECHOGENICITY Final Rejection BOSTON SCIENTIFIC SCIMED, INC.
19019695 DEVICE TRACKING USING LONGITUDINAL ENCODING Final Rejection KONINKLIJKE PHILIPS N.V.
18017684 NAVIGATION OPERATION INSTRUCTIONS Final Rejection KONINKLIJKE PHILIPS N.V.
18895047 MAGNETIC RESONANCE SCANNING SYSTEM AND METHOD Non-Final OA GE Precision Healthcare LLC
18089905 System and Method for Providing Guidance Itinerary for Interventional Medical Procedures Final Rejection GE Precision Healthcare LLC
19285808 METHOD AND MEDICAL SYSTEM FOR ADJUSTING A REFERENCE X-RAY IMAGE Non-Final OA Siemens Healthineers AG
18910160 Method and Device for Planning an MR Examination on an MRT System Final Rejection Siemens Healthineers AG
18750749 OFFSCREEN INDICATOR VIEWER USER INTERFACE Non-Final OA Auris Health, Inc.
19104034 BONE SCAFFOLD WITH SONOLUCENT WINDOW Non-Final OA RHODE ISLAND HOSPITAL

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Frequently Asked Questions

What is examiner Christopher L Cook's allowance rate?

47.5% of resolved applications examined by Christopher L Cook were allowed (566 resolved cases), compared with 0.0% across Art Unit 3737 over the last five years.

Does an interview help with examiner Christopher L Cook?

This examiner's interview lift is +25.7 percentage points: the difference in allowance rate between resolved applications that had an examiner interview and those that did not.

How long does examiner Christopher L Cook take to allow a patent?

Applications allowed by Christopher L Cook took 1,676 days on average from filing to allowance.

Which art unit does examiner Christopher L Cook work in?

Christopher L Cook examines applications in Art Unit 3737 in Tech Center 3700 (Medical Devices & Mechanical Engineering).

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