Patent JPS6049306A successfully refreshed from Google Patents.
US4384967A
Expired / Lapsed
US
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Lubricant composition containing an alkali metal borate and a sulfur-containing polyhydroxy compound
Assignee: Chevron USA Inc
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Filing: 1981-07-29
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Granted: 1983-05-24
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Expires: 2001-07-29
Abstract
Abstract Disclosed is a lubricant composition containing an oil of lubricating viscosity having dispersed therein a particulate hydrated alkali-metal borate and an effective amount of a sulfur-containing polyhydroxy compound which stabilizes the composition against the adverse effects of water contamination.
Inventors
- 👤 Christopher G. Salentine
- 👤 Vernon R. Small
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 21:14
CPC Classifications
C; C10; C10M; C10M141/00; C10M141/08; C10M125/00; C10M125/26; C10M135/00; C10M135/20; C10M135/22; C10M135/24; C10M2201/00; C10M2201/087; C10M2201/10; C10M2201/102; C10M2201/105; C10M2219/00; C10M2219/08; C10M2219/082; C10M2219/084
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
59 words
A lubricant composition comprising an oil of lubricating viscosity having dispersed therein: (a) 0.1 to 60 weight percent of a particulate hydrated alkali-metal borate and (b) an effective amount of a sulfur-containing polyhydroxy compound to prevent the accumulation of seal damaging borate deposits, wherein said sulfur-containing polyhydroxy compound is selected from 4-thiahexadecane-1,2-diol, 3-(phenylthio)-1,2-propanediol, 4-thiaoctane-1,2-diol, 4-thiadocosane-1,2-diol, and 6-C 13-16 alkyl-4-thiahexane-1,2,6-triol.
Claim 2
Dependent Claim
59 words
A lubricant composition comprising an oil of lubricating viscosity having dispersed therein: (a) 0.1 to 60 weight percent of a particulate hydrated alkali-metal borate and (b) an effective amount of a sulfur-containing polyhydroxy compound to prevent the accumulation of seal damaging borate deposits, wherein said sulfur-containing polyhydroxy compound is selected from 4-thiahexadecane-1,2-diol, 3-(phenylthio)-1,2-propanediol, 4-thiaoctane-1,2-diol, 4-thiadocosane-1,2-diol, and 6-C 13-16 alkyl-4-thiahexane-1,2,6-triol.
Claim 3
Dependent Claim
19 words
The lubricant composition of claim 1 having dispersed therein 0.01 to 5.0 weight percent of said sulfur-containing polyhydroxy compound.
Claim 4
Dependent Claim
19 words
The lubricant composition of claim 1 having dispersed therein 0.1 to 2.0 weight percent of said sulfur-containing polyhydroxy compound.
Claim 5
Dependent Claim
15 words
The lubricant composition of claim 1 wherein said alkali metal borate is a potassium triborate.
Claim 6
Dependent Claim
66 words
A lubricant composition comprising an oil of lubricating viscosity having dispersed therein: (a) 0.1 to 60 weight percent of a particulate hydrated alkali-metal borate and (b) an effective amount of a sulfur-containing polyhydroxy compound to prevent the accumulation of seal damaging borate deposits, wherein said polyhydroxy compound is of the formula: (C.sub.n H.sub.x S)(OH).sub.2 wherein: n is 7 to 30, and x is n to 2n.
Claim 7
Dependent Claim
66 words
A lubricant composition comprising an oil of lubricating viscosity having dispersed therein: (a) 0.1 to 60 weight percent of a particulate hydrated alkali-metal borate and (b) an effective amount of a sulfur-containing polyhydroxy compound to prevent the accumulation of seal damaging borate deposits, wherein said polyhydroxy compound is of the formula: (C.sub.n H.sub.x S)(OH).sub.2 wherein: n is 7 to 30, and x is n to 2n.
Claim 8
Dependent Claim
19 words
The lubricant composition of claim 5 having dispersed therein 0.01 to 5.0 weight percent of said sulfur-containing polyhydroxy compound.
Claim 9
Dependent Claim
19 words
The lubricant composition of claim 5 having dispersed therein 0.1 to 2.0 weight percent of said sulfur-containing polyhydroxy compound.
Claim 10
Dependent Claim
19 words
The lubricant composition of claim 5 wherein in the formula n is 9 to 21 and x is 2n.
Claim 11
Dependent Claim
15 words
The lubricant composition of claim 5 wherein said alkali metal borate is a potassium triborate.
References Cited (Backward Citations)
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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) | 1986-05-23 | 1986-11-22 | 1987-05-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-05-23 | 1990-11-22 | 1991-05-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-05-23 | 1994-11-22 | 1995-05-24 | $7700.00 | Window Closed / Lapsed |