Prosecution Insights
Last updated: October 02, 2026

Examiner: BOOK, PHYLLIS A

Tech Center 2400 • Art Units: 2400 2447 2454 2472

This examiner grants 83% of resolved cases

Analysis

Phyllis A. Book, an examiner in Tech Center 2400 and Art Unit 2400, has an allowance rate of 82.8 percent across 488 resolved cases. This high rate indicates a favorable docket for applicants. The median days to allowance is 844, which is a relatively efficient timeframe for the patent grant process. The 82.8 percent allowance rate is a strong indicator of success.

The interview lift is 14.4 percent, showing that direct communication with the examiner is quite effective. This lift can significantly enhance the baseline allowance rate. Practitioners should consider interviews as a primary tool for advancing prosecution. The 488 resolved cases provide a solid foundation for these metrics. The 844 day median pendency is a competitive timeline.

The combination of a high allowance rate and a 844 day median pendency makes this a productive docket for patent seekers. Utilizing the 14.4 percent interview lift can further streamline the path to a patent grant. With many cases resolved, the examiner's performance is well-documented. Applicants should feel confident in the success probability and the 14.4 percent lift from interviews.

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

Performance Statistics

82.8%
Allow Rate
+24.8% vs TC avg
493
Total Applications
+14.4%
Interview Lift
844
Avg Prosecution Days
Based on 488 resolved cases, 2023–2026

Rejection Statute Breakdown

8.2%
§101 Eligibility
10.4%
§102 Novelty
49.9%
§103 Obviousness
24.4%
§112 Clarity

Currently Pending Office Actions

App #TitleStatusAssignee
18963163 AUTHENTICATION METHOD AND COMMUNICATION APPARATUS Final Rejection HUAWEI TECHNOLOGIES CO., LTD.
18960635 SYSTEMS AND METHODS TO IMPROVE NOTIFICATIONS WITH TEMPORAL CONTENT Final Rejection Adeia Guides Inc.
19220648 DATA PACKET TRANSMISSION METHOD AND APPARATUS, DEVICE, STORAGE MEDIUM, AND PROGRAM PRODUCT Non-Final OA TENCENT TECHNOLOGY (SHENZHEN) COMPANY LIMITED
19242110 BREAKOUT CHAT CHANNELS Non-Final OA Zoom Communications, Inc.

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