US4536308A
Expired / Lapsed
US
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Lithium soap grease additive
Assignee: Texaco Inc
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Filing: 1984-10-01
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Granted: 1985-08-20
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Expires: 2004-10-01
Abstract
Abstract An experimental grease has been formulated with 8.5 wt % lithium 12-hydroxystearate in a base oil containing an additive composition of a synergistic blend of zinc dialkyldithiophosphates, zinc diamyldithiocarbamate, aromatic amine phosphate, sulfurized sperm oil substitute and the reaction product of coconut oil and diethanolamine. The lithium 12-hydroxystearate grease has been prepared by a standard kettle procedure. The grease composition exhibits a dropping point in the range expected of a lithium complex grease. The grease keeps its soap fiber structure intact at 390° to 400° F., typical of the melting range of lithium 12-hydroxystearate greases. The grease is useful for its long life in constant velocity joints.
Inventors
- 👤 Rebecca C. C. Pehler
- 👤 James R. Whiteman
- 👤 Arnold C. Witte, Jr.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 22:38
CPC Classifications
C; C10; C10M; C10M169/00; C10M169/06; C10M117/00; C10M117/02; C10M117/04; C10M133/00; C10M133/02; C10M133/04; C10M133/06; C10M133/08; C10M133/16; C10M135/00; C10M135/12; C10M135/14; C10M135/18; C10M137/00; C10M137/02; C10M137/04; C10M137/08; C10M137/10; C10M2207/00; C10M2207/10; C10M2207/12; C10M2207/121; C10M2207/124; C10M2207/1245; C10M2207/125; C10M2207/128; C10M2207/1285; C10M2215/00; C10M2215/02; C10M2215/04; C10M2215/042; C10M2215/08; C10M2215/082; C10M2215/086; C10M2215/12; C10M2215/122; C10M2215/24; C10M2215/28; C10M2219/00; C10M2219/02; C10M2219/024; C10M2219/06; C10M2219/062; C10M2219/066; C10M2219/068; C10M2223/00; C10M2223/02; C10M2223/04; C10M2223/043; C10M2223/045; C10N; C10N2010/00; C10N2010/02; C10N2010/04
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
83 words
A grease composition comprising a major portion of a mineral lubricating oil, a grease thickening amount of lithium 12-hydroxystearate and an effective amount of an additive composition, basis the grease composition said additive composition consisting of 4 to 8 wt % sulfurized sperm oil substitute, 0.5 to 2.0 wt % of the reaction product of coconut oil and diethanolamine, 2.4 to 5.0 wt % of zinc dialkyldithiophosphate, 0.5 to 2.0 wt % zinc diamyldithiocarbamate and 0.5 to 1.0 wt % aromatic amine phosphate.
Claim 2
Dependent Claim
83 words
A grease composition comprising a major portion of a mineral lubricating oil, a grease thickening amount of lithium 12-hydroxystearate and an effective amount of an additive composition, basis the grease composition said additive composition consisting of 4 to 8 wt % sulfurized sperm oil substitute, 0.5 to 2.0 wt % of the reaction product of coconut oil and diethanolamine, 2.4 to 5.0 wt % of zinc dialkyldithiophosphate, 0.5 to 2.0 wt % zinc diamyldithiocarbamate and 0.5 to 1.0 wt % aromatic amine phosphate.
Claim 3
Dependent Claim
24 words
The grease composition of claim 1 wherein the lithium 12-hydroxystearate comprises about 8 wt % to about 25 wt % of the grease composition.
Claim 4
Dependent Claim
24 words
The grease composition of claim 1 wherein the lithium 12-hydroxystearate comprises about 8 wt % to about 10 wt % of the grease composition.
Claim 5
Dependent Claim
24 words
The grease composition of claim 1 wherein the additive composition comprises about 5 wt % to about 10 wt % of the grease composition.
Claim 6
Dependent Claim
21 words
The grease composition of claim 1 wherein the reaction product of coconut oil and diethanolamine comprises 0.5 to 1.0 wt %.
Claim 7
Dependent Claim
16 words
The grease composition of claim 1 wherein the zinc diamyldithiocarbamate comprises 0.5 to 1.0 wt %.
Claim 8
Dependent Claim
82 words
The grease composition of claim 1 wherein the sulfurized sperm oil substitute is in an amount of 4 to 8 wt %; the reaction product of coconut oil and diethanol amine is in an amount of 0.5 to 1.0 wt %; the zinc dialkyldithiophosphate is in an amount of 2.4 to 5.0 wt %; the zinc diamyldithiocarbamate is in an amount of 0.5 to 1.0 wt % and the aromatic amine phosphate is in an amount of 0.5 to 1.0 wt %.
Claim 9
Dependent Claim
52 words
A grease additive composition comprising 40 to 55 wt % sulfurized sperm oil substitute, 6 to 12 wt % of the reaction product of coconut oil and diethanolamine, 25 to 35 wt % of zinc dialkyldithiophosphate, 6 to 12 wt % zinc diamyldithiocarbamate and 6 to 12 wt % aromatic amine phosphate.
Claim 10
Dependent Claim
52 words
A grease additive composition comprising 40 to 55 wt % sulfurized sperm oil substitute, 6 to 12 wt % of the reaction product of coconut oil and diethanolamine, 25 to 35 wt % of zinc dialkyldithiophosphate, 6 to 12 wt % zinc diamyldithiocarbamate and 6 to 12 wt % aromatic amine phosphate.
Claim 11
Dependent Claim
27 words
The additive composition of claim 8 which is dissolved in a lubricating oil in an amount of 10 to 13 pounds lubricating oil per pound of additive.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-08-19 | 1989-02-18 | 1989-08-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-08-19 | 1993-02-18 | 1993-08-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-08-19 | 1997-02-18 | 1997-08-20 | $7700.00 | Window Closed / Lapsed |