Patents
US 9399747 B2: Low ash lubricants with improved seal and corrosion performance
- Granted
- 2016-07-26
- Filed
- 2011-05-17 application 13698144
- Type
- Utility · 15 claims
- Elsewhere
- Google Patents ↗ · USPTO patent document ↗ · USPTO Patent Center record ↗
Abstract
A lubricant composition of (a) an oil of lubricating viscosity; (b) a dispersant comprising the condensation product of a carboxylic functionalized polymer with an aromatic amine having at least 3 aromatic rings and at least one primary or secondary amino group; and (c) an overbased metal detergent comprising an oil-soluble neutral metal salt component and a metal carbonate component, provides good seal and corrosion performance. The total amount of neutral metal salt component in the lubricant composition is at least about 0.75 percent by weight and the sulfated ash level of the lubricant composition is less than about 1.1 percent.
Source: PVGPATDIS, file of 2026-04-10 (ipg160726.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 |
|---|---|---|---|---|
| Matthew D. Gieselman | Wickliffe, OH | 52 | PVGPATDIS, file of 2026-04-10 | |
| Mary Galic Raguz | Mentor, OH | 5 | PVGPATDIS, file of 2026-04-10 | |
| John G. Loop | Logan, OH | 4 | 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 | C10M165/00 | PVGPATDIS, file of 2026-04-10 |
| C10N | Indexing scheme associated with subclass c10m relating to lubricating compositions | C10N2020/04 | PVGPATDIS, file of 2026-04-10 |
Cooperative Patent Classification, as currently assigned (one row per subclass).
Assignments and security interests
| Recorded | What | From | To | Reel/frame | Source |
|---|---|---|---|---|---|
| 2013-01-17 | Assignment Assignment of assignor's interest | GALIC RAGUZ, MARY signed 2012-11-30 GIESELMAN, MATTHEW D. signed 2012-11-30 LOOP, JOHN G. signed 2012-11-30 | THE LUBRIZOL CORPORATION WICKLIFFE, OH | 29648/167 | ECORSEXC, file of 2026-09-25 |
Documents recorded with the USPTO Assignment Recordation Branch that list this patent. A security interest is a lender’s claim on the patent as collateral; a release ends it.
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.