US3944495A
Expired / Lapsed
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Metal dialkyldithiophosphates
Assignee: Texaco Inc
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Filing: 1974-02-19
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Granted: 1976-03-16
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Expires: 1994-02-19
Abstract
Abstract Novel metal dialkyldithiophosphates prepared from oxalkylated long, straight-chain alcohols, acids and mercaptans and their incorporation in lubricating oils to enhance the lubricity and other properties thereof; and a method for operation of an automatic transmission incorporating said oils.
Inventors
- 👤 Morris A. Wiley
- 👤 Raymond C. Schlicht
- 👤 James O. Waldbillig
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 13:13
CPC Classifications
C; C07; C07F; C07F9/00; C07F9/02; C07F9/06; C07F9/16; C07F9/165; C07F9/1651; C10; C10M; C10M1/00; C10M1/08; C10M137/00; C10M137/02; C10M137/04; C10M137/10; C10M2209/00; C10M2209/02; C10M2209/08; C10M2209/084; C10M2215/00; C10M2215/02; C10M2215/04; C10M2215/06; C10M2215/064; C10M2215/065; C10M2215/24; C10M2215/26; C10M2217/00; C10M2217/02; C10M2217/022; C10M2217/04; C10M2217/046; C10M2217/06; C10M2223/00; C10M2223/02; C10M2223/04; C10M2223/045; C10M2225/00; C10M2225/02; C10M2229/00; C10M2229/04; C10M2229/041; C10N; C10N2010/00; C10N2010/02; C10N2010/04; C10N2020/00; C10N2020/01; C10N2040/00; C10N2040/08
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
109 words
An automatic transmission fluid comprising at least about 80 wt. % of a mineral lubricating oil and from about 0.01 to 5.0 wt. % of an alkyl dithiophosphate represented by the formula: ##EQU8## wherein: R is a straight-chain aliphatic radial containing from about 4 to 30 carbon atoms; X is carbonyloxy; R' is selected from a hyrogen, alkyl, and aryl radical; M is selected from an alkali metal, an alkaline earth metal, and a transition metal; a is an integer of from about 2 to about 12; b is an integer of from about 1 to about 10; and n is an integer corresponding to the valence of M.
Claim 2
Dependent Claim
109 words
An automatic transmission fluid comprising at least about 80 wt. % of a mineral lubricating oil and from about 0.01 to 5.0 wt. % of an alkyl dithiophosphate represented by the formula: ##EQU8## wherein: R is a straight-chain aliphatic radial containing from about 4 to 30 carbon atoms; X is carbonyloxy; R' is selected from a hyrogen, alkyl, and aryl radical; M is selected from an alkali metal, an alkaline earth metal, and a transition metal; a is an integer of from about 2 to about 12; b is an integer of from about 1 to about 10; and n is an integer corresponding to the valence of M.
Claim 3
Dependent Claim
10 words
A composition according to claim 1 wherein M is zinc.
Claim 4
Dependent Claim
20 words
A composition according to claim 1 wherein R is a straight-chain alkyl radical of from 10 to 20 carbon atoms.
Claim 5
Dependent Claim
27 words
A composition according to claim 1 wherein R' is hydrogen and a is the integer 2 and b is an integer of from about 1 to 10.
Claim 6
Dependent Claim
13 words
A composition according to claim 1 wherein said dithiophosphate is zinc bis[di)n-stearayloxytetraethoxyethyl) dithiophosphate].
Claim 7
Dependent Claim
93 words
A composition according to claim 1 wherein said automatic transmission fluid includes about 0.5 to 10 wt. % of a polymer of mixed alkyl esters of methacrylic acid having a molecular weight of from 25,000 to 1,250,000; about 0.25 to about 5.0 wt. % of a dispersant resulting from the reaction of a polyalkylene polyamine and a compound selected from an alkenyl succinic acid and an alkenyl succinic anhydride, about 0.1 to about 2.5 wt. % of an amine antioxidant and about 0.1 to 5 wt. % of a metal dialkyl phenoxyalkyl dithiophosphate.
Claim 8
Dependent Claim
70 words
A composite according to claim 6 wherein said automatic transmission fluid includes a base oil comprised of about 65% furfural refined, acid-treated, clay-contacted, solvent-dewaxed paraffin base distillate; about 22% of an acid-treated naphthenic base distillate; and about 13% of a paraffin base residuum which has been prepared, deasphalted, solvent-dewaxed and clay-contacted, and having a flash above 375° F., a pour below 0° F. and a viscosity index of about 93.
Claim 9
Independent Claim
122 words
A method for operating an automatic transmission which comprises supplying to and running said transmission on a fluid oil composition comprising at least about 80% of a mineral lubricating oil and from about 0.01 to 5.0 wt. % of an alkyl dithiophosphate represented by the formula: ##EQU9## wherein: R is a straight-chain aliphatic radical containing from about 4 to 30 carbon atoms; X is carbonyloxy; R' is selected from a hydrogen, alkyl and aryl radical; M is selected from an alkali metal, an alkaline earth metal, and a transition metal; a is an integer of from about 2 to about 12; b is an integer of from about 1 to about 10; n is an integer corresponding to the valence of M.
Claim 10
Independent Claim
122 words
A method for operating an automatic transmission which comprises supplying to and running said transmission on a fluid oil composition comprising at least about 80% of a mineral lubricating oil and from about 0.01 to 5.0 wt. % of an alkyl dithiophosphate represented by the formula: ##EQU9## wherein: R is a straight-chain aliphatic radical containing from about 4 to 30 carbon atoms; X is carbonyloxy; R' is selected from a hydrogen, alkyl and aryl radical; M is selected from an alkali metal, an alkaline earth metal, and a transition metal; a is an integer of from about 2 to about 12; b is an integer of from about 1 to about 10; n is an integer corresponding to the valence of M.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-03-16 | 1979-09-15 | 1980-03-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-03-16 | 1983-09-15 | 1984-03-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-03-16 | 1987-09-15 | 1988-03-16 | $7700.00 | Window Closed / Lapsed |