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US4904403A
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Polyalkylated 1,3,4-thiadiazoles and lubricating compositions containing same
Assignee: Vanderbilt Chemicals LLC
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Filing: 1989-06-12
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Granted: 1990-02-27
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Expires: 2009-06-12
Abstract
Abstract Disclosed are novel compounds derived from 2,5-dimercapto-1,3,4-thiadiazole and one or two moles of polyolefin having 5 to 400 carbon atoms. Furthermore, the 5-position of the 2-mercapto-1,3,4-thiadiazole may be substituted by alkylthio, 2-hydroxyalkylthio, amino or hydroxy group. The compounds are effective dispersants, antiwear agents and antioxidants when incorporated into lubricating compositions.
Inventors
- 👤 Thomas J. Karol
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 08:23
CPC Classifications
C; C07; C07D; C07D285/00; C07D285/01; C07D285/02; C07D285/04; C07D285/12; C07D285/125; C10; C10M; C10M135/00; C10M135/32; C10M135/36; C10M2201/00; C10M2201/10; C10M2201/102; C10M2201/103; C10M2207/00; C10M2207/10; C10M2207/12; C10M2207/125; C10M2207/129; C10M2217/00; C10M2217/04; C10M2217/044; C10M2217/045; C10M2219/00; C10M2219/10; C10M2219/102; C10M2219/104; C10M2219/106; C10N; C10N2040/00; C10N2040/25; C10N2040/251; C10N2040/252; C10N2040/253; C10N2040/255; C10N2040/28
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
55 words
A compound having the structural formula ##STR5## wherein R 1 represents hydroxy, amino, mercapto, alkylthio, 2-hydroxyalkylthio or R 2 S-group and R 2 represents a polyolefin residue and is characterised by the formulae ##STR6## wherein R 3 is an alkyl group having 50 to 400 carbon atoms and R 4 is hydrogen or methyl group.
Claim 2
Dependent Claim
55 words
A compound having the structural formula ##STR5## wherein R 1 represents hydroxy, amino, mercapto, alkylthio, 2-hydroxyalkylthio or R 2 S-group and R 2 represents a polyolefin residue and is characterised by the formulae ##STR6## wherein R 3 is an alkyl group having 50 to 400 carbon atoms and R 4 is hydrogen or methyl group.
Claim 3
Dependent Claim
88 words
A composition comprising a major amount of oil of lubricating viscosity selected from the group consisting of petroleum hydrocarbon oil and synthetic oil and from about 0.1 to 10 percent by weight of a compound having the structural formula ##STR7## wherein R 1 represents hydroxy, amino, mercapto, alkylthio, 2-hydroxyalkylthio or R 2 S-group and R 2 represents a polyolefin residue and is characterized by the formulae ##STR8## wherein R 3 is an alkyl group having 50 to 400 carbon atoms and R 4 is hydrogen or methyl group.
Claim 4
Dependent Claim
88 words
A composition comprising a major amount of oil of lubricating viscosity selected from the group consisting of petroleum hydrocarbon oil and synthetic oil and from about 0.1 to 10 percent by weight of a compound having the structural formula ##STR7## wherein R 1 represents hydroxy, amino, mercapto, alkylthio, 2-hydroxyalkylthio or R 2 S-group and R 2 represents a polyolefin residue and is characterized by the formulae ##STR8## wherein R 3 is an alkyl group having 50 to 400 carbon atoms and R 4 is hydrogen or methyl group.
Claim 5
Dependent Claim
21 words
A compound according to claim 1 wherein the polyolefin residue is derived from epoxidized polyolefin having 50 to 200 carbon atoms.
Claim 6
Dependent Claim
21 words
A compound according to claim 1 wherein the polyolefin residue is derived from chlorinated polyolefin having 50 to 200 carbon atoms.
References Cited (Backward Citations)
US2719126A
Cited
US2719125A
Cited
US2736729A
Cited
US2850453A
Cited
CA966842A
Cited
CA1048994A
Cited
US3980573A
Cited
US4410703A
Cited
US4301019A
Cited
US4306988A
Cited
US4790948A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-02-26 | 1993-08-28 | 1994-02-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-02-26 | 1997-08-28 | 1998-02-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-02-26 | 2001-08-28 | 2002-02-27 | $7700.00 | Window Closed / Lapsed |