Prosecution Insights
Last updated: October 02, 2026

Examiner: DEL SOLE, JOSEPH STEVEN

Tech Center 4100 • Art Units: 1700 1743 1744 1754 1761 1763 1791 4100

This examiner grants 35% of resolved cases

Analysis

Joseph Steven Del Sole is assigned to Art Unit 1700 in Tech Center 4100. He has handled 136 resolved cases, resulting in an allowance rate of 35.3 percent. This 35.3 percent rate provides a baseline for evaluating the probability of a grant. The 136 resolved cases offer a data set for analyzing his typical prosecution outcomes in Tech Center 4100.

The median time to allowance for these applications is 1202 days. The interview lift is 14.0 percent. This 14.0 percent lift suggests that cases involving an interview have a higher probability of allowance than those without. Practitioners should consider the 1202-day median pendency and the 14.0 percent lift when deciding whether to engage the examiner directly in Art Unit 1700.

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

Performance Statistics

35.3%
Allow Rate
-24.7% vs TC avg
158
Total Applications
+14.0%
Interview Lift
1202
Avg Prosecution Days
Based on 136 resolved cases, 2023–2026

Rejection Statute Breakdown

0.5%
§101 Eligibility
20.4%
§102 Novelty
52.8%
§103 Obviousness
19.9%
§112 Clarity

Currently Pending Office Actions

App #TitleStatusAssignee
18265674 CUTTER BLADE AND GRANULATION APPARATUS Final Rejection THE JAPAN STEEL WORKS, LTD.
17614127 PROPYLENE-ETHYLENE-alpha-OLEFIN COPOLYMER, POLYPROPYLENE COMPOSITION, AND USE THEREFOR Non-Final OA MITSUI CHEMICALS, INC.

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