Prosecution Insights
Last updated: October 25, 2026

Joan Elizabeth Diehl, USPTO Patent Examiner

Listed by the USPTO as DIEHL, JOAN ELIZABETH

Tech Center 2900 • Art Units: 2917 2923 2938

This examiner grants 92% of resolved cases

Analysis

Joan Elizabeth Diehl examines cases in Art Unit 2917 of Tech Center 2900. She has resolved 156 cases, maintaining a high allowance rate of 92.3 percent. Her interview lift is 9.6 percent, indicating that while her allowance rate is already high, interviews can still provide a modest benefit to applicants.

The median days to allowance is 741. This timeline is particularly relevant for Tria Pte. Ltd. and Niikura Scales Co. Ltd., the top companies listed in her portfolio. These applicants experience a high probability of success, as evidenced by the 92.3 percent allowance rate and the 741 day median pendency.

Patent Law Works, LLP is the top firm appearing in her records. The 741 day median pendency and 156 resolved cases suggest a consistent examination environment. Practitioners can expect a path to grant, with the 9.6 percent interview lift available as a secondary strategy to ensure the 92.3 percent allowance rate is achieved.

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

Performance Statistics

92.3%
Allow Rate
+32.3% vs TC avg
159
Total Applications
+9.6%
Interview Lift
741
Avg Prosecution Days
Based on 156 resolved cases, 2023–2026

Rejection Statute Breakdown

0%
§101 Eligibility
4.7%
§102 Novelty
3.0%
§103 Obviousness
69.8%
§112 Clarity

Currently Pending Office Actions

App #TitleStatusAssignee
35522743 Packaging for foodstuffs Non-Final OA Tria Pte. Ltd.
35527058 Bundle Of Bags For Packaging Non-Final OA Niikura Scales Co., Ltd.

Facing This Examiner?

IP Author analyzes examiner patterns and generates tailored response strategies with the highest chance of allowance.

Build Your Strategy

Who Appears Before This Examiner

Top companies before this examiner

Law firms appearing most often

Frequently Asked Questions

What is examiner Joan Elizabeth Diehl's allowance rate?

92.3% of resolved applications examined by Joan Elizabeth Diehl were allowed (156 resolved cases), compared with 97.2% across Art Unit 2917 over the last five years.

Does an interview help with examiner Joan Elizabeth Diehl?

This examiner's interview lift is +9.6 percentage points: the difference in allowance rate between resolved applications that had an examiner interview and those that did not.

How long does examiner Joan Elizabeth Diehl take to allow a patent?

Applications allowed by Joan Elizabeth Diehl took 741 days on average from filing to allowance.

Which art unit does examiner Joan Elizabeth Diehl work in?

Joan Elizabeth Diehl examines applications in Art Unit 2917 in Tech Center 2900.

Sign in with your work email

Enter your email to receive a magic link. No password needed.

Personal email addresses (Gmail, Yahoo, etc.) are not accepted.

Free tier: 3 strategy analyses per month