US3640872A
Expired / Lapsed
US
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Automatic transmission fluid
Assignee: Texaco Inc
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Filing: 1968-10-25
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Granted: 1972-02-08
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Expires: 1988-10-25
Abstract
Abstract Automatic transmission fluid comprising a mineral lubricating oil, a zinc di-(alkylphenoxyalkoxyalkyl) dithiophosphate, a nitrogen-containing methacrylate polymer, a polyethylene polyamine-alkenyl succinic anhydride reaction product, an arylsubstituted naphthylamine and an N-acyl sarcosine, and a method of operating an automatic transmission.
Inventors
- 👤 Morris A Wiley
- 👤 Roger G Lacoste
- 👤 Clemence J Henry
- 👤 James O Waldbillig
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 02:38
CPC Classifications
C; C10; C10M; C10M1/00; C10M1/08; C10M2207/00; C10M2207/10; C10M2207/12; C10M2207/125; C10M2207/129; C10M2209/00; C10M2209/02; C10M2209/08; C10M2209/084; C10M2215/00; C10M2215/02; C10M2215/04; C10M2215/06; C10M2215/064; C10M2215/065; C10M2215/066; C10M2215/08; C10M2215/082; C10M2215/086; C10M2215/12; C10M2215/22; C10M2215/221; C10M2215/225; C10M2215/226; C10M2215/24; C10M2215/26; C10M2215/28; C10M2215/30; C10M2217/00; C10M2217/02; C10M2217/022; C10M2217/023; C10M2217/04; C10M2217/046; C10M2217/06; C10M2219/00; C10M2219/04; C10M2219/044; C10M2219/046; C10M2223/00; C10M2223/02; C10M2223/04; C10M2223/042; C10M2223/045; C10M2225/00; C10M2225/02; C10M2229/00; C10M2229/04; C10M2229/041; C10N; C10N2010/00; C10N2010/04; C10N2020/00; C10N2020/01; C10N2040/00; C10N2040/08
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
23 words
An automatic transmission fluid according to claim 1 in which said zinc di(C6 15 alkylphenoxypolyalkoxyalkyl) dithiophosphate is a zinc di(C6 15 alkylphenoxyethyl) dithiophosphate.
Claim 2
Dependent Claim
21 words
An automatic transmission fluid according to claim 1 in which said zinc di(C6 15 alkylphenoxypolyalkoxyalkyl) dithiophosphate is zinc di (nonxylphenoxyethyl) dithiophosphate.
Claim 3
Dependent Claim
122 words
An automatic transmission fluid according to claim 1 in which said mineral lubricating oil consists of about 65 percent of a furfural refined, acid-treated, clay-contacted, solvent-dewaxed, paraffin base distilLate having an SUS at 100* F. of 100, a viscosity index about 100, a flash above 380* F. and a pour below about +10* F., 22 percent of an acid-treated, naphthenic base distillate having an SUS at 100* F. of 60, a flash above 300* F., and a pour below -40* F. and 13 percent of a paraffin base residuum which has been propane deasphalted, centrifuged dewaxed, and clay contacted and which has an SUS viscosity at 210* F. of about 160, a flash above 530* F. and a pour of +5* F.
Claim 4
Dependent Claim
39 words
An automatic transmission fluid according to claim 1 additionally containing as an antirust additive from about 1 to 5 percent of an overbased calcium sulfonate or carboxylate and from about 0.05 to 0.08 percent of an overbased barium sulfonate.
Claim 5
Dependent Claim
50 words
An automatic transmission fluid according to claim 1 containing from about 0.02 to 0.25 percent of an additive combination comprising about 91 percent of a hydrolyzed C6 18 alkenyl succinic acid anhydride, 7.5 percent of a mixture of mono- and di-C12 alkyl phosphoric acid esters and 1.5 percent of phenol.
Claim 6
Dependent Claim
190 words
An automatic transmission fluid according to claim 1 in which said mineral lubricating oil comprises 65 percent of a furfural-refined, acid-treated, clay-contacted, solvent-dewaxed paraffin based distillate having an SUS at 100* F. of 100, a viscosity index about 100, a flash above 380* F. and a pour below about +10* F., 22 percent of an acid-treated, naphthenic base distillate having an SUS at 100* F. of 60, a flash above 300* F. and a pour below -40* F. and 13 percent of a paraffin base residuum which has been propane deasphalted, centrifuged dewaxed and clay contacted and which has an SUS viscosity at 210* F. of about 160, a flash above 530* F. and a pour of +5* F., 0.1 to 5.0 percent of a zinc di (nonylphenoxyethyl) dithiophosphate, 0.5 to 10 percent of nitrogen-containing polymer of mixed alkyl and amino alkyl esters of methacrylic acid having a molecular weight in the range of 35,000 to 200,000, 0.5 to 5 percent of a reaction product of a tetraethylene pentamine and an alkenyl succinic anhydride, 0.1 to 2.5 percent of phenyl alpha naphthylamine and 0.5 to 1 percent of N-stearoyl sarcosine.
References Cited (Backward Citations)
US3450636A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-02-07 | 1975-08-09 | 1976-02-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-02-07 | 1979-08-09 | 1980-02-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-02-07 | 1983-08-09 | 1984-02-08 | $7700.00 | Window Closed / Lapsed |