US4487706A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Metal deactivator as a lubricant additive
Assignee: EDWIN COOPER Inc A CORP OF
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Filing: 1983-02-15
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Granted: 1984-12-11
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Expires: 2003-02-15
Abstract
Abstract A metal deactivator especially useful in lubricating oil is made by reacting 2,5-dimercapto-1,3,4-thiadiazole, an olefin and sulfur dichloride in the mole ratio of about 1:0.9-2.5 0.9-2.5.
Inventors
- 👤 William Y. Lam
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 23:54
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; C10M2219/00; C10M2219/10; C10M2219/102; C10M2219/104; C10M2219/106
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
43 words
A metal deactivator made by a process comprising reacting (a) about one mole of 2,5-dimercapto-1,3,4-thiadiazole, (b) about 0.9-2.5 moles of an olefin containing 6-30 carbon atoms and (c) about 0.9-2.5 moles of sulfur dichloride at a temperature of about 30° C. to reflux.
Claim 2
Dependent Claim
43 words
A metal deactivator made by a process comprising reacting (a) about one mole of 2,5-dimercapto-1,3,4-thiadiazole, (b) about 0.9-2.5 moles of an olefin containing 6-30 carbon atoms and (c) about 0.9-2.5 moles of sulfur dichloride at a temperature of about 30° C. to reflux.
Claim 3
Dependent Claim
25 words
A metal deactivator of claim 1 wherein the amount of olefin is about 1.8-2.5 moles and the amount of sulfur dichloride is about 1.8-2.5 moles.
Claim 4
Dependent Claim
19 words
A metal deactivator of claim 2 prepared in a chlorohydrocarbon solvent having a normal boiling point below 200° C.
Claim 5
Dependent Claim
11 words
A metal deactivator of claim 2 wherein said olefin is diisobutylene.
Claim 6
Dependent Claim
15 words
A metal deactivator of claim 4 wherein the amount of diisobutylene is about 1.9-2.2 moles.
Claim 7
Dependent Claim
16 words
A metal deactivator of claim 5, wherein the amount of sulfur dichloride is about 1.9-2.2 moles.
Claim 8
Dependent Claim
45 words
A process for making a metal deactivator, said process comprising reacting (a) about one mole of 2,5-dimercapto-1,3,4-thiadiazole (b) about 0.9-2.5 moles of an olefin containing 6-30 carbon atoms and (c) about 0.9-2.5 moles of sulfur dichloride at a temperature of about 30° C. to reflux.
Claim 9
Dependent Claim
45 words
A process for making a metal deactivator, said process comprising reacting (a) about one mole of 2,5-dimercapto-1,3,4-thiadiazole (b) about 0.9-2.5 moles of an olefin containing 6-30 carbon atoms and (c) about 0.9-2.5 moles of sulfur dichloride at a temperature of about 30° C. to reflux.
Claim 10
Dependent Claim
24 words
A process of claim 7 wherein the amount of olefin is about 1.8-2.5 moles and the amount of sulfur dichloride is about 1.8-2.5 moles.
Claim 11
Dependent Claim
18 words
A process of claim 8 prepared in a chlorohydrocarbon solvent having a normal boiling point below 200° C.
Claim 12
Dependent Claim
10 words
A process of claim 7 wherein said olefin is diisobutylene.
Claim 13
Dependent Claim
14 words
A process of claim 10 wherein the amount of diisobutylene is about 1.9-2.2 moles.
Claim 14
Dependent Claim
15 words
A process of claim 11 wherein the amount of sulfur dichloride is about 1.9-2.2 moles.
Claim 15
Dependent Claim
52 words
A lubricating oil composition containing a metal deactivating amount of a product made by a process comprising reacting (a) about one mole of 2,5-dimercapto-1,3,4-thiadiazole (b) about 0.9-2.5 moles of an olefin containing 6-30 carbon atoms and (c) about 0.9-2.5 moles of sulfur dichloride at a temperature of about 30° C. to reflux.
Claim 16
Dependent Claim
52 words
A lubricating oil composition containing a metal deactivating amount of a product made by a process comprising reacting (a) about one mole of 2,5-dimercapto-1,3,4-thiadiazole (b) about 0.9-2.5 moles of an olefin containing 6-30 carbon atoms and (c) about 0.9-2.5 moles of sulfur dichloride at a temperature of about 30° C. to reflux.
Claim 17
Dependent Claim
26 words
A lubricating oil composition of claim 13 wherein the amount of olefin is about 1.8-2.5 moles and the amount of sulfur dichloride is about 1.8-2.5 moles.
Claim 18
Dependent Claim
20 words
A lubricating oil composition of claim 14 prepared in a chlorohydrocarbon solvent having a normal boiling point below 200° C.
Claim 19
Dependent Claim
12 words
A lubricating oil composition of claim 14 wherein said olefin is diisobutylene.
Claim 20
Dependent Claim
16 words
A lubricating oil composition of claim 16 wherein the amount of diisobutylene is about 1.9-2.2 moles.
Claim 21
Dependent Claim
17 words
A lubricating oil composition of claim 17 wherein the amount of sulfur dichloride is about 1.9-2.2 moles.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-12-11 | 1988-06-11 | 1988-12-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-12-11 | 1992-06-11 | 1992-12-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-12-11 | 1996-06-11 | 1996-12-11 | $7700.00 | Window Closed / Lapsed |