Prosecution Insights
Last updated: October 25, 2026

Durham University

Technology areas: Biotechnology & Pharmaceuticals • Chemistry & Materials

2 pending office actions • 2 art units • 2 examiners • 0 of 2 (0%) have an AI response strategy ready

Analysis

Durham University has 2 pending office actions in the Chemistry & Materials technology area. These actions are split between 2 distinct examiners and 2 distinct art units, showing a one to one ratio of matters to examiners and units. This distribution indicates that each pending application is being reviewed by a different examiner in a different technical section of the office.

QIAN, SHIZHI is the busiest examiner with 1 pending office action. With 2 pending office actions and 2 distinct examiners, the workload is evenly divided. This distribution indicates that the university's current prosecution efforts are specialized across 2 different technical groups within the Chemistry & Materials sector. For a practitioner, this means that the outcome of one matter is unlikely to be directly influenced by the examiner handling the other.

The involvement of 2 distinct art units for 2 pending office actions suggests that the university is pursuing distinct technical paths within the chemistry field. Because QIAN, SHIZHI only manages 1 pending office action, the university benefits from the perspectives of 2 different examiners. This arrangement provides a broader range of feedback than if both matters were assigned to a single examiner or art unit.

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

Portfolio Summary

2
Total Pending OAs
2
Non-Final OAs
0
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.

1
Hard (50%)
1
Medium (50%)
0
Easy (0%)
0
Unknown (0%)

Rejection Statute Mix

BucketCases
Double-patenting + other1 (50%)
Multi-statute (no §101)1 (50%)

Industry Mix

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

2
Life Sciences
100% of docket
0
Information Tech
0% of docket
0
Communications
0% of docket
0
Semiconductors
0% 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.

20 h
Manual time on pending OAs
4 h
Time saved (low, 20%)
7 h
Time saved (mid, 35%)
0.2 wks
FTE-weeks freed (mid)

Top Examiners on this docket

ExaminerApps on this docketAllow rateInterview lift
QIAN, SHIZHI 1 62.0% +46.2%
PERREIRA, MELISSA JEAN 1 52.1% +25.7%

Hard Cases (1)

Multi-statute / §101-driven matters, or cases in front of an examiner with an allow rate under 30%. The top 1 ordered by deadline are shown.

App #TitleExaminerDue in
18867752 AN ELECTROCHEMICAL SENSOR AND METHOD FOR DETECTING PATHOGENIC METABOLITES QIAN, SHIZHI —

Interview Candidates (2)

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 2 ordered by deadline are shown.

App #TitleExaminerDue in
18867752 AN ELECTROCHEMICAL SENSOR AND METHOD FOR DETECTING PATHOGENIC METABOLITES QIAN, SHIZHI —
18149934 MECHANICAL OPENING OF LIPID BILAYERS BY MOLECULAR NANOMACHINES PERREIRA, MELISSA JEAN —

Top Art Units

Art UnitApps
1795 1
1618 1

Pending Office Actions

App #TitleExaminerArt UnitStatutesStatusDue inAIFiled
18867752 AN ELECTROCHEMICAL SENSOR AND METHOD FOR DETECTING PATHOGENIC METABOLITES QIAN, SHIZHI 1795 §102§103 Non-Final OA — Pending Nov 20, 2024
18149934 MECHANICAL OPENING OF LIPID BILAYERS BY MOLECULAR NANOMACHINES PERREIRA, MELISSA JEAN 1618 §102§103DP Non-Final OA — Pending Jan 04, 2023

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Frequently Asked Questions

How many pending USPTO office actions does Durham University have?

Durham University has 2 pending office actions as of October 2026, spread across 2 art units and 2 examiners.

Which USPTO examiner handles the most Durham University applications?

Shizhi Qian has the most, with 1 of Durham University's pending office actions.

What technology area are Durham 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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