Prosecution Insights
Last updated: October 04, 2026

John Crane UK Limited

Technology areas: Chemistry & Materials • Transportation, E-Commerce & Mechanical Systems

3 pending office actions • 2 art units • 3 examiners • 0 of 3 (0%) have an AI response strategy ready • 1 patents granted in the last 365 days

Analysis

John Crane UK Limited currently has 3 pending office actions in the Chemistry & Materials technology area. These matters are distributed among 3 distinct examiners and 2 distinct art units. WESTALL, ALEC STONE is the busiest examiner, with 1 pending office action. Because there are multiple examiners for the active actions, each matter is being reviewed by a different individual, though they are clustered within the same technical groups.

The presence of 2 distinct art units indicates some technical variety within the Chemistry & Materials portfolio. With 1 pending office action assigned to WESTALL, ALEC STONE, the company's prosecution strategy must account for the specific preferences of this examiner while also managing the other active matters.

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

Portfolio Summary

3
Total Pending OAs
1
Non-Final OAs
2
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 (33%)
2
Medium (67%)
0
Easy (0%)
0
Unknown (0%)

Rejection Statute Mix

BucketCases
§103 only2 (67%)
Multi-statute (no §101)1 (33%)

Industry Mix

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

1
Life Sciences
33% of docket
0
Information Tech
0% of docket
0
Communications
0% of docket
0
Semiconductors
0% of docket
1
Mechanical / Eng
33% of docket
1
Business / Other
33% 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.

30 h
Manual time on pending OAs
6 h
Time saved (low, 20%)
10 h
Time saved (mid, 35%)
0.3 wks
FTE-weeks freed (mid)

Top Examiners on this docket

ExaminerApps on this docketAllow rateInterview lift
WESTALL, ALEC STONE 1 — —
GONZALEZ, MADELINE 1 72.6% +15.7%
LEE, GILBERT Y 1 78.7% +10.7%

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
18012742 MECHANICAL SEAL ASSEMBLY AND METHOD OF ASSEMBLY OF A MECHANICAL SEAL LEE, GILBERT Y —

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
18415975 FILTER ELEMENT ARRANGEMENT WITHIN A FILTER SYSTEM GONZALEZ, MADELINE —
18012742 MECHANICAL SEAL ASSEMBLY AND METHOD OF ASSEMBLY OF A MECHANICAL SEAL LEE, GILBERT Y —

Top Art Units

Art UnitApps
1773 1
3675 1

Pending Office Actions

App #TitleExaminerArt UnitStatutesStatusDue inAIFiled
18631609 FILTER MONITORING WESTALL, ALEC STONE — §103 Non-Final OA — Pending Apr 10, 2024
18415975 FILTER ELEMENT ARRANGEMENT WITHIN A FILTER SYSTEM GONZALEZ, MADELINE 1773 §103 Final Rejection — Pending Jan 18, 2024
18012742 MECHANICAL SEAL ASSEMBLY AND METHOD OF ASSEMBLY OF A MECHANICAL SEAL LEE, GILBERT Y 3675 §102§103 Final Rejection — Pending Jul 11, 2023

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