Lubricating composition containing non-acidic phosphorus compounds
USRE44475E1 · kind E1 · reissue
1Cited by
17References
8Claims
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Key dates
| Filing date | Feb 24, 2012 |
| Grant date | Sep 3, 2013 |
| Priority date | — |
| Expiry date | Feb 24, 2032 |
Classification
- Technology area (CPC —)General
Abstract
A lubricating composition with improved storage stability comprising a major amount of an oil of lubricating viscosity, at least one alkali metal borate, at least one polysulfide mixture having at least 40% dihydrocarbyl tetrasulfide or higher sulfides, and at least one non-acidic phosphorus compound comprised of a trihydrocarbyl phosphate and a dihydrocarbyl dithiophosphate derivative is disclosed. In addition to improved storage stability, the composition has improved wear performance when the ratio of polysulfides is controlled.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.