Prosecution Insights
Last updated: October 27, 2026

Central South University

Technology areas: Biotechnology & Pharmaceuticals • Chemistry & Materials • Semiconductors, Circuits & Optics

5 pending office actions • 5 art units • 5 examiners • 0 of 5 (0%) have an AI response strategy ready • 20 patents granted in the last 365 days

Analysis

Central South University has 5 pending office actions in Chemistry & Materials. The matters involve 5 distinct examiners and 5 distinct art units. PATEL, DEVANG R is the busiest examiner, with 1 pending matter. The data shows complete distribution across the listed examination assignments.

This structure calls for organized portfolio management and matter-specific prosecution. Counsel should maintain consistent definitions for chemical and materials concepts while reviewing each examiner’s objections, cited art, and amendment possibilities independently. The distinct art units may reflect different technical contexts, so grouping responses solely by subject matter could obscure important examination differences. A central disclosure and claim review can reduce inconsistency, while interviews and written responses should be tailored to the assigned examiner and art-unit record.

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

Portfolio Summary

5
Total Pending OAs
4
Non-Final OAs
1
Final Rejections
0
Advisory / Quayle

Case Difficulty Mix

Difficulty is derived from the rejection statutes on the most recent pending office action. §101-driven and multi-statute cases are graded Hard; §112-only and obviousness-type double-patenting cases are graded Easy; everything else is Medium. "Unknown" means we have not yet parsed a statute for that office action.

2
Hard (40%)
2
Medium (40%)
1
Easy (20%)
0
Unknown (0%)

Rejection Statute Mix

BucketCases
§101 + other2 (40%)
§103 only1 (20%)
§112 only1 (20%)
Double-patenting + other1 (20%)

Industry Mix

How the docket's pending cases split across USPTO tech-center bands.

3
Life Sciences
60% of docket
0
Information Tech
0% of docket
0
Communications
0% of docket
2
Semiconductors
40% of docket
0
Mechanical / Eng
0% of docket
0
Business / Other
0% of docket

Time-on-OA Estimate

Manual office-action response work runs about 10 hours per case. The time-saved bands below show what IP Author's prosecution pipeline typically delivers — a conservative 20% on the low end, 35% in the middle, 50% on the high end.

50 h
Manual time on pending OAs
10 h
Time saved (low, 20%)
18 h
Time saved (mid, 35%)
0.4 wks
FTE-weeks freed (mid)

Top Examiners on this docket

ExaminerApps on this docketAllow rateInterview lift
PATEL, DEVANG R 1 65.6% +39.0%
MENSING, RODGER STEWART 1 — —
CONTRERAS, CIEL P 1 54.3% +33.6%
SCHINDLER, DAVID M 1 40.6% +23.8%
WISE, OLIVIA M. 1 33.9% +29.9%

Hard Cases (2)

Multi-statute / §101-driven matters, or cases in front of an examiner with an allow rate under 30%. The top 2 ordered by deadline are shown.

App #TitleExaminerDue in
18610408 Magnetotelluric Impedance Estimation Method MENSING, RODGER STEWART —
18267450 TRAIN COMPARTMENT AIR ADJUSTMENT AND CONTROL METHOD AND APPARATUS, STORAGE MEDIUM, AND PROGRAM PRODUCT WISE, OLIVIA M. —

Interview Candidates (4)

Cases in front of an examiner whose interview lift is 10 percentage points or more — i.e. interviewed cases historically resolve more favorably than non-interviewed ones. The top 4 ordered by deadline are shown.

App #TitleExaminerDue in
18729247 Nanoparticle Dispersion Strengthened Copper Alloy and Preparation Method and Use Thereof PATEL, DEVANG R —
18287658 METHOD FOR PREPARING TITANIUM METAL BY MOLTEN SALT ELECTROLYSIS CONTRERAS, CIEL P —
18371883 HOLOGRAPHIC ELECTROMAGNETIC EXPLORATION METHOD BASED ON FULL-AREA OBSERVATION ALTERNATING COVERAGE INTEGRAL-DIFFERENCE MIXED STIMULUS SCHINDLER, DAVID M —
18267450 TRAIN COMPARTMENT AIR ADJUSTMENT AND CONTROL METHOD AND APPARATUS, STORAGE MEDIUM, AND PROGRAM PRODUCT WISE, OLIVIA M. —

Top Art Units

Art UnitApps
1735 1
2857 1
1794 1
2858 1
1685 1

Pending Office Actions

App #TitleExaminerArt UnitStatutesStatusDue inAIFiled
18729247 Nanoparticle Dispersion Strengthened Copper Alloy and Preparation Method and Use Thereof PATEL, DEVANG R 1735 §103 Non-Final OA — Pending Jul 16, 2024
18610408 Magnetotelluric Impedance Estimation Method MENSING, RODGER STEWART 2857 §101§103§112 Non-Final OA — Pending Mar 20, 2024
18287658 METHOD FOR PREPARING TITANIUM METAL BY MOLTEN SALT ELECTROLYSIS CONTRERAS, CIEL P 1794 §102§103DP Non-Final OA — Pending Oct 20, 2023
18371883 HOLOGRAPHIC ELECTROMAGNETIC EXPLORATION METHOD BASED ON FULL-AREA OBSERVATION ALTERNATING COVERAGE INTEGRAL-DIFFERENCE MIXED STIMULUS SCHINDLER, DAVID M 2858 §112 Final Rejection — Pending Sep 22, 2023
18267450 TRAIN COMPARTMENT AIR ADJUSTMENT AND CONTROL METHOD AND APPARATUS, STORAGE MEDIUM, AND PROGRAM PRODUCT WISE, OLIVIA M. 1685 §101§103§112 Non-Final OA — Pending Jun 14, 2023

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Frequently Asked Questions

How many pending USPTO office actions does Central South University have?

Central South University has 5 pending office actions as of October 2026, spread across 5 art units and 5 examiners.

Which USPTO examiner handles the most Central South University applications?

Devang R Patel has the most, with 1 of Central South University's pending office actions.

What technology area are Central South University's patent applications in?

Mostly Chemistry & Materials (USPTO Tech Center 1700), based on where its pending office actions are examined.

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