US4532062A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Additive for power transmission shift fluids
Assignee: ExxonMobil Technology and Engineering Co
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Filing: 1984-01-23
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Granted: 1985-07-30
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Expires: 2004-01-23
Abstract
Abstract There are disclosed improved additives for power shift transmission fluids being amine or ammonium salts of mercaptobenzothiazole dissolved in excess amine. The additives are useful as corrosion inhibitors, anti-oxidants and friction modifiers.
Inventors
- 👤 Jack Ryer
- 👤 Ricardo Bloch
- 👤 Harold E. Deen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 07:23
CPC Classifications
C; C10; C10M; C10M135/00; C10M135/32; C10M135/36; C10M2215/00; C10M2215/086; C10M2215/24; C10M2215/28; C10N; C10N2040/00; C10N2040/08; C10N2040/25; C10N2040/252; C10N2040/253
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
116 words
A power shift transmission fluid composition comprising a major amount of hydrocarbon mineral oil of lubricating viscosity and an effective oxidation and corrosion inhibiting and friction modifying amount of an additive being an amine or ammonium salt of mercaptobenzothiazole dissolved in a molar excess of amine, said salt being formed by reacting mercaptobenzothiazole with a molar excess of a liquid amine, said excess being about 1.2 to 3 moles of amine per mole of mercaptobenzothiazole, the amine having the formula R 1 R 2 R 3 N at 50°-80° C. when R 1 and R 2 may be hydrogen or lower C 1 -C 4 alkyl and R 3 is a C 6 -C 20 alkyl.
Claim 2
Dependent Claim
116 words
A power shift transmission fluid composition comprising a major amount of hydrocarbon mineral oil of lubricating viscosity and an effective oxidation and corrosion inhibiting and friction modifying amount of an additive being an amine or ammonium salt of mercaptobenzothiazole dissolved in a molar excess of amine, said salt being formed by reacting mercaptobenzothiazole with a molar excess of a liquid amine, said excess being about 1.2 to 3 moles of amine per mole of mercaptobenzothiazole, the amine having the formula R 1 R 2 R 3 N at 50°-80° C. when R 1 and R 2 may be hydrogen or lower C 1 -C 4 alkyl and R 3 is a C 6 -C 20 alkyl.
Claim 3
Dependent Claim
58 words
A composition according to claim 1 wherein R 1 and R 2 are hydrogen and R 3 is a tertiary alkyl group of the formula R 4 R 5 R 6 C-- wherein R 4 and R 5 are methyl and R 6 represents either C 15 -C 20 or C 9 -C 11 mixed branched alkyl groups.
Claim 4
Dependent Claim
16 words
The composition of claim 2 wherein there is present 0.2 to 0.5 wt% of said additive.
Claim 5
Dependent Claim
16 words
The composition of claim 1 wherein said power shift transmission fluid is an automatic transmission fluid.
Claim 6
Dependent Claim
18 words
The composition of claim 1 wherein said power shift transmission fluid is a universal heavy duty diesel oil.
References Cited (Backward Citations)
US3600398A
Cited
US3966623A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-07-29 | 1989-01-28 | 1989-07-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-07-29 | 1993-01-28 | 1993-07-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-07-29 | 1997-01-28 | 1997-07-30 | $7700.00 | Window Closed / Lapsed |