Patent US4376060A successfully refreshed from Google Patents.
US4376060A
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US
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Process for preparing lithium soap greases containing borate salt with high dropping point
Assignee: ExxonMobil Technology and Engineering Co
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Filing: 1981-11-04
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Granted: 1983-03-08
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Expires: 2001-11-04
Abstract
Abstract This invention relates to a process of preparing a high dropping point grease comprising a combination of a selected lithium soap of hydroxy fatty acid and a lithium salt of boric acid wherein said lithium salt of boric acid is formed in situ in the presence of an additive amount of selected water soluble polyhydroxy compound.
Inventors
- 👤 James F. Stadler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 23:27
CPC Classifications
C; C10; C10M; C10M169/00; C10M169/06; C10M123/00; C10M123/02; C10M2201/00; C10M2201/06; C10M2201/0606; C10M2201/061; C10M2201/0616; C10M2201/062; C10M2201/0626; C10M2201/065; C10M2201/0656; C10M2201/066; C10M2201/0666; C10M2201/08; C10M2201/0806; C10M2201/085; C10M2201/0856; C10M2201/086; C10M2201/0866; C10M2201/087; C10M2201/0876; C10M2201/10; C10M2201/1013; C10M2201/102; C10M2201/1026; C10M2207/00; C10M2207/02; C10M2207/021; C10M2207/022; C10M2207/023; C10M2207/10; C10M2207/106; C10M2207/12; C10M2207/1206; C10M2207/121; C10M2207/124; C10M2207/1245; C10M2207/125; C10M2207/128; C10M2207/1285; C10M2207/14; C10M2207/1406; C10M2207/141; C10M2207/1415; C10M2207/142; C10M2207/144; C10M2207/146; C10M2207/26; C10M2207/2613; C10M2207/262; C10M2207/2626; C10N; C10N2010/00; C10N2010/02
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
76 words
In a process of preparing a lithium soap grease composition of high dropping point comprising a major portion of lubricating oil and a thickener system whose essential components include a lithium soap of C 12 to C 24 hydroxy fatty acid and a lithium salt of boric acid the improvement wherein the lithium salt of boric acid is formed in situ in the presence of an effective additive amount of water soluble polyhydroxy alcohol or phenol.
Claim 2
Dependent Claim
76 words
In a process of preparing a lithium soap grease composition of high dropping point comprising a major portion of lubricating oil and a thickener system whose essential components include a lithium soap of C 12 to C 24 hydroxy fatty acid and a lithium salt of boric acid the improvement wherein the lithium salt of boric acid is formed in situ in the presence of an effective additive amount of water soluble polyhydroxy alcohol or phenol.
Claim 3
Dependent Claim
31 words
The process of claim 1 wherein said polyhydroxy compound is present in an amount of from about 0.1 to about 1 wt%, based on the total weight of the grease composition.
Claim 4
Dependent Claim
21 words
The process of claim 2 wherein said polyhydroxy compound is a dihydric or polyhydric alcohol or phenol of the cis form.
Claim 5
Dependent Claim
18 words
The process of claim 3 wherein from about 2 to 30 wt% of said thickener system is present.
Claim 6
Dependent Claim
11 words
The process of claim 4 wherein said polyhydroxy compound is glycerol.
Claim 7
Dependent Claim
51 words
The process of claim 5 wherein the thickener system includes as a third component a lithium salt of a second hydroxy carboxylic acid of from 3 to 14 carbon atoms, wherein the hydroxy group is attached to a carbon atom not more than 6 carbon atoms removed from the carboxy group.
Claim 8
Dependent Claim
46 words
The process of claim 6 wherein there are about 3 to about 100 parts by weight of hydroxy fatty acid per part by weight of boric acid and from about 0.1 to about 10 parts of said second hydroxy carboxylic acid per part of boric acid.
Claim 9
Dependent Claim
13 words
The process of claim 5 wherein said hydroxy fatty acid is 12-hydroxystearic acid.
Claim 10
Dependent Claim
21 words
The process of claim 6 wherein said hydroxy fatty acid is 12-hydroxystearic acid and said second hydroxycarboxylic acid is salicyclic acid.
Claim 11
Dependent Claim
18 words
The process of claim 9 wherein from about 0.25 to about 0.5 wt.% of said glycerol is used.
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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) | 1986-03-07 | 1986-09-06 | 1987-03-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-03-07 | 1990-09-06 | 1991-03-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-03-07 | 1994-09-06 | 1995-03-08 | $7700.00 | Window Closed / Lapsed |