US4863622A
Expired / Lapsed
US
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Phosphorus-free antiwear/antifriction additives
Assignee: Pennzoil Quaker State Co
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Filing: 1988-03-31
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Granted: 1989-09-05
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Expires: 2008-03-31
Abstract
Abstract A phosphorous free antiwear/antifriction additive for lubricant oil is described. The additive is a fatty acid thio ester or a dialkyl disubstituted fatty acid thio amine having the formula of <IMAGE> or <IMAGE> wherein R1 is a saturated or unsaturated hydrocarbon having 8 to 40 carbon atoms; R2, R3 and R4 are hydrocarbons having 1 to 4 carbon atoms; and n=1 to 4.
Inventors
- 👤 I.-Ching Chiu
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 09:08
CPC Classifications
C; C10; C10M; C10M135/00; C10M135/20; C10M135/22; C10M135/26; C10M2219/00; C10M2219/06; C10M2219/08; C10M2219/082; C10M2219/085; C10N; C10N2040/00; C10N2040/25; C10N2040/251; C10N2040/255; C10N2040/28
Claims Analysis
Total Claims: 25
Claim 1
Independent Claim
63 words
A composition comprising a lubricant oil and an antiwear/antifriction effective amount of a compound having the structural formula, selected from the group consisting of: ##STR4## wherein R 1 is a saturated or unsaturated hydrocarbon having 8 to 40 carbon atoms; R 2 , R 3 and R 4 are hydrocarbons having 1 to 4 carbon atoms; and n=an integer of 1 to 4.
Claim 2
Dependent Claim
63 words
A composition comprising a lubricant oil and an antiwear/antifriction effective amount of a compound having the structural formula, selected from the group consisting of: ##STR4## wherein R 1 is a saturated or unsaturated hydrocarbon having 8 to 40 carbon atoms; R 2 , R 3 and R 4 are hydrocarbons having 1 to 4 carbon atoms; and n=an integer of 1 to 4.
Claim 3
Dependent Claim
21 words
The composition of claim 1 wherein said compound is present in a concentration of 0.1 to about 5 percent by weight.
Claim 4
Dependent Claim
18 words
The composition of claim 2 wherein said compound is present in a concentration of 1 to 2.5 percent.
Claim 5
Dependent Claim
18 words
The composition of claim 1 wherein R 1 is an unsaturated hydrocarbon having 10 to 20 carbon atoms.
Claim 6
Dependent Claim
27 words
The composition of claim 1 wherein the compound is of the formula: ##STR5## wherein R 1 , R 2 and n are as defined in claim 1.
Claim 7
Dependent Claim
23 words
The composition of claim 5 wherein R 1 is a hydrocarbon of 18 carbon atoms, R 2 is methyl, and n is 1.
Claim 8
Dependent Claim
54 words
A composition comprising a lubricant oil and an antiwear/antifriction effective amount of a compound having the structural formula ##STR6## wherein R 1 is a saturated or unsaturated hydrocarbon having 8 to 40 carbon atoms; R 3 and R 4 are hydrocarbons having 1 to 4 carbon atoms; and n=an integer of 1 to 4.
Claim 9
Dependent Claim
54 words
A composition comprising a lubricant oil and an antiwear/antifriction effective amount of a compound having the structural formula ##STR6## wherein R 1 is a saturated or unsaturated hydrocarbon having 8 to 40 carbon atoms; R 3 and R 4 are hydrocarbons having 1 to 4 carbon atoms; and n=an integer of 1 to 4.
Claim 10
Dependent Claim
26 words
The composition of claim 7 wherein R 1 is a hydrocarbon of 18 carbon atoms, R 3 and R 4 are methyl and n is 1.
Claim 11
Independent Claim
73 words
A method for enhancing the antiwear properties of a lubricant composition comprising adding to a lubricant oil an antiwear effective amount of a compound having the structural formula selected from the group consisting of: ##STR7## wherein R 1 is a saturated or unsaturated hydrocarbon having 8 to 40 carbon atoms; R 2 , R 3 and R 4 are hydrocarbons having 1 to 4 carbon atoms; and n=an integer of 1 to 4.
Claim 12
Independent Claim
73 words
A method for enhancing the antiwear properties of a lubricant composition comprising adding to a lubricant oil an antiwear effective amount of a compound having the structural formula selected from the group consisting of: ##STR7## wherein R 1 is a saturated or unsaturated hydrocarbon having 8 to 40 carbon atoms; R 2 , R 3 and R 4 are hydrocarbons having 1 to 4 carbon atoms; and n=an integer of 1 to 4.
Claim 13
Dependent Claim
21 words
The method of claim 9 wherein said compound is present in a concentration of 0.1 to about 5 percent by weight.
Claim 14
Dependent Claim
18 words
The method of claim 10 wherein said compound is present in a concentration of 1 to 2.5 percent.
Claim 15
Dependent Claim
16 words
The method of claim 9 wherein R 1 is an unsaturated hydrocarbon having 18 carbon atoms.
Claim 16
Dependent Claim
28 words
The method of claim 12 wherein R 1 is a hydrocarbon of 18 carbon atoms, R 2 is methyl, and n is an integer of 1 to 4.
Claim 17
Dependent Claim
29 words
The method of claim 9 wherein the effective compound is of the structural formula: ##STR8## wherein R 1 , R 2 and n are as defined in claim 9.
Claim 18
Independent Claim
64 words
A method for enhancing the antiwear properties of a lubricant composition comprising adding to a lubricant oil an antiwear effective amount of a compound having the structural formula ##STR9## wherein R 1 is a saturated or unsaturated hydrocarbon having 8 to 40 carbon atoms; R 3 and R 4 are hydrocarbons having 1 to 4 carbon atoms; and n=an integer of 1 to 4.
Claim 19
Independent Claim
64 words
A method for enhancing the antiwear properties of a lubricant composition comprising adding to a lubricant oil an antiwear effective amount of a compound having the structural formula ##STR9## wherein R 1 is a saturated or unsaturated hydrocarbon having 8 to 40 carbon atoms; R 3 and R 4 are hydrocarbons having 1 to 4 carbon atoms; and n=an integer of 1 to 4.
Claim 20
Dependent Claim
26 words
The method of claim 15 wherein R 1 is a hydrocarbon of 18 carbon atoms, R 3 and R 4 are methyl and n is 1.
Claim 21
Dependent Claim
39 words
A compound having the formula: ##STR10## wherein R 1 is a saturated or unsaturated hydrocarbon having 8 to 40 carbon atoms; R 2 is a hydrocarbon having 1 to 4 carbon atoms; and n=an integer of 1 to 4.
Claim 22
Dependent Claim
39 words
A compound having the formula: ##STR10## wherein R 1 is a saturated or unsaturated hydrocarbon having 8 to 40 carbon atoms; R 2 is a hydrocarbon having 1 to 4 carbon atoms; and n=an integer of 1 to 4.
Claim 23
Dependent Claim
19 words
A compound according to claim 17 wherein R 1 is an aliphatic hydrocarbon of 10 to 20 carbon atoms.
Claim 24
Dependent Claim
17 words
A compound according to claim 17 wherein R 1 is derived from oleic acid or tall oil.
Claim 25
Dependent Claim
22 words
A compound according to claim 17 wherein R 1 is derived from oleic acid, R 2 is methyl and n is 1.
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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) | 1992-09-04 | 1993-03-06 | 1993-09-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-09-04 | 1997-03-06 | 1997-09-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-09-04 | 2001-03-06 | 2001-09-05 | $7700.00 | Window Closed / Lapsed |