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Low ash lubricant compositions for internal combustion engines (PT-727)    
United States Patent5102566   
Link to this pagehttp://www.wikipatents.com/5102566.html
Inventor(s)Fetterman, Jr.; Glen P. (Morris Plains, NJ); Schetelich; Alan A. (Scotch Plains, NJ)
AbstractIn accordance with the present invention, there are provided low sulfacted ash lubricating oil compositions which comprise an oil of lubricating viscosity as the major component and as the minor component (A) at least about 2 wt % of at least one ashless nitrogen- or ester-containing dispersant, (B) an antioxidant effective amount of at least one oil soluble antioxidant material, and (C) at least one oil soluble dihydrocarbyl dithiophosphate antiwear material wherein the hydrocarbyl groups contain an average of at least 3 carbon atoms, and wherein the lubricating oil is characterized by a total sulfated ash (SASH) level of from 0.01 to about 0.6 wt % and by a SASH wt:dispersant wt ratio of from about 0.01 to about 0.2:1.
   














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Drawing from US Patent 5102566
Low ash lubricant compositions for internal combustion engines (PT-727) - US Patent 5102566 Drawing
Low ash lubricant compositions for internal combustion engines (PT-727)
Inventor     Fetterman, Jr.; Glen P. (Morris Plains, NJ); Schetelich; Alan A. (Scotch Plains, NJ)
Owner/Assignee     Exxon Chemical Patents Inc. (Linden, NJ)
Patent assignment
All assignments
Publication Date     April 7, 1992
Application Number     07/332,906
PAIR File History     Application Data   Transaction History
Image File Wrapper   Patent Term   Fees
Litigation
Filing Date     April 3, 1989
US Classification     508/294 508/375 508/376 508/380 508/435
Int'l Classification     C10M 161/00 C10M 145/08
Examiner     Howard; Jacqueline V.
Assistant Examiner    
Attorney/Law Firm     Murray, Jr.; J. B .
Address
Parent Case     CROSS-REFERENCE TO RELATED APPLICATION This application is a continuation-in-part of our co-pending application Ser. No. 104,125, filed Oct. 2, 1987, now abandoned.
Priority Data    
USPTO Field of Search     252/32.7 E 252/51.5 A 252/51.5 R
Patent Tags     low ash lubricant compositions internal combustion engines (pt-727)
   
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Market Size
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