Technology area: Chemistry & Materials
3 pending office actions • 3 art units • 3 examiners • 0 of 3 (0%) have an AI response strategy ready • 4 patents granted in the last 365 days
Castrol Limited is currently navigating 3 pending office actions within the Chemistry & Materials technology area. These actions are distributed among 3 distinct examiners and 3 distinct art units. This distribution shows that each pending matter is being handled by a unique examiner in a unique art unit, spreading the portfolio across multiple points of contact within the USPTO. Such a spread suggests that the company's current filings cover a variety of technical sub-niches within the broader chemistry field, as each matter has triggered review by a different specialized group.
SLIFKA, COLIN W is the busiest examiner for the portfolio, with 1 pending office action under their review. This single action constitutes a portion of the 3 pending office actions currently active for Castrol Limited. The presence of multiple distinct art units and examiners indicates a lack of examiner concentration, which may require the company to manage separate prosecution tracks simultaneously. Each pending office action represents a distinct opportunity for patent allowance, but also requires individual attention to the specific preferences of the 1 examiner involved in each case.
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.
| Bucket | Cases |
|---|---|
| §112 only | 1 (33%) |
| Double-patenting + other | 1 (33%) |
| Multi-statute (no §101) | 1 (33%) |
How the docket's pending cases split across USPTO tech-center bands.
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.
| Examiner | Apps on this docket | Allow rate | Interview lift |
|---|---|---|---|
| DOUYETTE, KENNETH J | 1 | 81.9% | +14.3% |
| SLIFKA, COLIN W | 1 | 67.4% | +16.1% |
| CHEN, NING | 1 | 0.0% | +0.0% |
Cases in front of an examiner with an allow rate of 80%+ where the difficulty is Easy or Medium. The top 1 ordered by deadline are shown.
| App # | Title | Examiner | Due in |
|---|---|---|---|
| 18284855 | HEAT TRANSFER SYSTEM WITH HEAT TRANSFER FLUID INCLUDING LIQUID AND GAS COMPONENTS | DOUYETTE, KENNETH J | — |
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 # | Title | Examiner | Due in |
|---|---|---|---|
| 18547812 | Dielectric Thermal Management Fluids and Methods for Using Them | CHEN, NING | — |
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 # | Title | Examiner | Due in |
|---|---|---|---|
| 18284855 | HEAT TRANSFER SYSTEM WITH HEAT TRANSFER FLUID INCLUDING LIQUID AND GAS COMPONENTS | DOUYETTE, KENNETH J | — |
| 18284856 | Heat Transfer System with Heat Transfer Fluid Including Liquid and Gas Components | SLIFKA, COLIN W | — |
| Art Unit | Apps |
|---|---|
| 1725 | 1 |
| 1732 | 1 |
| 1723 | 1 |
| App # | Title | Examiner | Art Unit | Statutes | Status | Due in | AI | Filed |
|---|---|---|---|---|---|---|---|---|
| 18284855 | HEAT TRANSFER SYSTEM WITH HEAT TRANSFER FLUID INCLUDING LIQUID AND GAS COMPONENTS | DOUYETTE, KENNETH J | 1725 | §102§103DP | Non-Final OA | — | Pending | Sep 28, 2023 |
| 18284856 | Heat Transfer System with Heat Transfer Fluid Including Liquid and Gas Components | SLIFKA, COLIN W | 1732 | §112 | Non-Final OA | — | Pending | Sep 28, 2023 |
| 18547812 | Dielectric Thermal Management Fluids and Methods for Using Them | CHEN, NING | 1723 | §103§112Other | Non-Final OA | — | Pending | Aug 24, 2023 |
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Start Free TrialCastrol Limited has 3 pending office actions as of October 2026, spread across 3 art units and 3 examiners.
Kenneth J Douyette has the most, with 1 of Castrol Limited's pending office actions.
Mostly Chemistry & Materials (USPTO Tech Center 1700), based on where its pending office actions are examined.
