Prosecution Insights
Last updated: October 02, 2026

Examiner: LIANG, VEI CHUNG

Tech Center 2800 • Art Units: 2157 2165 2169 2800

This examiner grants 62% of resolved cases

Analysis

Vei Chung Liang is assigned to Tech Center 2800 and Art Unit 2157. The examiner has 136 resolved cases, resulting in an allowance rate of 62.5 percent. This figure serves as a primary indicator of the probability of obtaining a patent grant. The median days to allowance of 1404 shows the typical length of the prosecution cycle. Practitioners should factor this 1404-day period into their long-term planning for applications in this unit.

The interview lift of 63.7 percent is a significant finding in the data. This 63.7 percent increase in the allowance rate suggests that interviews are a highly effective tool for resolving rejections. With 136 resolved cases, the examiner's performance in Art Unit 2157 is clearly defined. The 62.5 percent allowance rate, combined with the impact of interviews, provides a strategic roadmap for applicants. Navigating Tech Center 2800 requires a thorough understanding of these specific metrics.

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

Performance Statistics

62.5%
Allow Rate
-5.5% vs TC avg
136
Total Applications
+63.7%
Interview Lift
1404
Avg Prosecution Days
Based on 136 resolved cases, 2023–2026

Rejection Statute Breakdown

17.4%
§101 Eligibility
28.8%
§102 Novelty
39.6%
§103 Obviousness
13.1%
§112 Clarity

Currently Pending Office Actions

App #TitleStatusAssignee
18708859 PRESS FORMING ANALYSIS METHOD, PRESS FORMING ANALYSIS APPARATUS, AND PRESS FORMING ANALYSIS PROGRAM Final Rejection JFE STEEL CORPORATION

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