Patents
US 12305141 B2: Zinc free lubricating compositions and methods of using the same
- Granted
- 2025-05-20
- Filed
- 2022-04-01 application 18285004
- Type
- Utility · 25 claims
- Elsewhere
- Google Patents ↗ · USPTO patent document ↗ · USPTO Patent Center record ↗
Abstract
The instant disclosure generally relates to lubricating compositions having an oil of lubricating viscosity, an ashless phosphorus-containing antiwear agent an alkaline earth metal detergent, an ashless antioxidant, and an ashless dispersant where the lubricating compositions are substantially free of zinc and methods of lubricating an engine with such lubricating compositions. The instant lubricating compositions are useful as alternative lubricating compositions the reduce and/or eliminate zinc to achieve a desired performance goal of the lubricating composition.
Source: PVGPATDIS, file of 2026-04-10 (ipg250520.xml).
Assignees
| Assignee | Type | Place | Also on furp.org | Source |
|---|---|---|---|---|
| The Lubrizol Corporation 368 patents | US company or organization | Wickliffe, OH | PVGPATDIS, file of 2026-04-10 |
Inventors
| Inventor | Place | Patents | Person page | Source |
|---|---|---|---|---|
| Paul R. Vincent | Belper, GB | 5 | PVGPATDIS, file of 2026-04-10 | |
| William R. S. Barton | Belper, GB | 55 | PVGPATDIS, file of 2026-04-10 | |
| Emma Fahey | Belper, GB | 1 | PVGPATDIS, file of 2026-04-10 | |
| Yanshi Zhang | Solon, OH | 36 | PVGPATDIS, file of 2026-04-10 | |
| Mark C. Davies | Derby, GB | 28 | PVGPATDIS, file of 2026-04-10 | |
| Ewan E. Delbridge | Goornong, AU | 53 | PVGPATDIS, file of 2026-04-10 |
CPC categories
| Subclass | Category | First group | Source |
|---|---|---|---|
| C10M | Lubricating compositions ; use of chemical substances either alone or as lubricating ingredients in a lubricating composition | C10M169/044 | PVGPATDIS, file of 2026-04-10 |
| C10N | Indexing scheme associated with subclass c10m relating to lubricating compositions | C10N2030/041 | PVGPATDIS, file of 2026-04-10 |
Cooperative Patent Classification, as currently assigned (one row per subclass).
Assignments and security interests
No recorded assignments or security interests on file for this patent.
USPTO bulk data: PatentsView granted patents, disambiguated (PVGPATDIS) for patents, assignees, inventors, places and CPC categories; the USPTO Patent Assignment Dataset (ECORSEXC) for assignments and security interests. Patents filed in the last 20 years. No claims or full text. Links to other records are by name (and state): EXACT means the identical full name and state; FUZZY means a looser name match, with the confidence shown.