Patent US4440965A successfully refreshed from Google Patents.
US4440965A
Expired / Lapsed
US
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Polymer lubricants
Assignee: Phillips Petroleum Co
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Filing: 1982-05-18
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Granted: 1984-04-03
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Expires: 2002-05-18
Abstract
Abstract Hydrogenated 1,3-butadiene polymers are used as synthetic lubricants. The polymers of this invention range in molecular weight from about 150 to about 3,000 and are characterized by a 1,2 addition structure of at least about 60 percent.
Inventors
- 👤 Richard F. Palmer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 23:29
CPC Classifications
C; C10; C10M; C10M107/00; C10M107/02; C10M107/14; C08; C08C; C08C19/00; C08C19/02; C10M2205/00; C10M2205/06
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
107 words
A lubrication method which comprises positioning between two surfaces, at least one of which is movable with respect to the other, a lubricant to reduce friction between said surfaces; wherein said lubricant is of the formula ##STR21## where A is a negative ion; wherein n is a whole number greater than 2; wherein each R in each ##STR22## group is independently selected from the group consisting of H and --CH 2 CH 3 such that at least about 60% of the R's are CH 2 CH 3 ; and wherein the average molecular weight of said lubricant is within the range of about 150 to about 3,000.
Claim 2
Dependent Claim
107 words
A lubrication method which comprises positioning between two surfaces, at least one of which is movable with respect to the other, a lubricant to reduce friction between said surfaces; wherein said lubricant is of the formula ##STR21## where A is a negative ion; wherein n is a whole number greater than 2; wherein each R in each ##STR22## group is independently selected from the group consisting of H and --CH 2 CH 3 such that at least about 60% of the R's are CH 2 CH 3 ; and wherein the average molecular weight of said lubricant is within the range of about 150 to about 3,000.
Claim 3
Dependent Claim
22 words
A method in accordance with claim 1 wherein said average molecular weight is within the range of about 280 to about 600.
Claim 4
Dependent Claim
68 words
A lubrication method which comprises positioning between two surfaces, at least one of which is movable with respect to the other, a lubricant to reduce fraction between said surfaces; wherein said lubricant is hydrogenated 1,3-butadiene polymer having an average molecular weight within the range of about 150 to about 3,000; and wherein said polymer is characterized by an average 1,2 addition structure of at least about 60 percent.
Claim 5
Dependent Claim
68 words
A lubrication method which comprises positioning between two surfaces, at least one of which is movable with respect to the other, a lubricant to reduce fraction between said surfaces; wherein said lubricant is hydrogenated 1,3-butadiene polymer having an average molecular weight within the range of about 150 to about 3,000; and wherein said polymer is characterized by an average 1,2 addition structure of at least about 60 percent.
Claim 6
Dependent Claim
23 words
A lubrication method in accordance with claim 3 wherein said average molecular weight is within the range of about 280 to about 600.
Claim 7
Dependent Claim
20 words
A lubrication method in accordance with claim 4 wherein said average 1,2 addition structure is less than about 70 percent.
Claim 8
Dependent Claim
20 words
A lubrication method in accordance with claim 4 wherein said average 1,2 addition structure is at least about 70 percent.
Claim 9
Dependent Claim
77 words
A synthetic lubricant of the formula ##STR23## where A is a negative ion; wherein n is a whole number greater than 2; wherein each R in each ##STR24## group is independently selected from the group consisting of H and --CH 2 CH 3 such that at least about 60% of said R's are --CH 2 CH 3 ; and wherein the average molecular weight of said lubricant is within the range of about 150 to about 3,000.
Claim 10
Dependent Claim
77 words
A synthetic lubricant of the formula ##STR23## where A is a negative ion; wherein n is a whole number greater than 2; wherein each R in each ##STR24## group is independently selected from the group consisting of H and --CH 2 CH 3 such that at least about 60% of said R's are --CH 2 CH 3 ; and wherein the average molecular weight of said lubricant is within the range of about 150 to about 3,000.
Claim 11
Dependent Claim
22 words
A lubricant in accordance with claim 7 wherein said average molecular weight is within the range of about 280 to about 600.
Claim 12
Dependent Claim
33 words
A synthetic lubricant comprising hydrogenated 1,3-butadiene polymer having an average molecular weight within the range of about 150 to about 3,000 and an average 1,2 addition structure of at least about 60 percent.
Claim 13
Dependent Claim
33 words
A synthetic lubricant comprising hydrogenated 1,3-butadiene polymer having an average molecular weight within the range of about 150 to about 3,000 and an average 1,2 addition structure of at least about 60 percent.
Claim 14
Dependent Claim
23 words
A synthetic lubricant in accordance with claim 9 wherein said average molecular weight is within the range of about 280 to about 600.
Claim 15
Dependent Claim
20 words
A synthetic lubricant in accordance with claim 10 wherein said average 1,2 addition structure is less than about 70 percent.
Claim 16
Dependent Claim
20 words
A synthetic lubricant in accordance with claim 10 wherein said average 1,2 addition structure is at least about 70 percent.
Claim 17
Dependent Claim
23 words
A synthetic lubricant in accordance with claim 7, 8, 9, 10, 11, 12 or 13 having a pour point below about -20° C.
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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) | 1987-04-03 | 1987-10-03 | 1988-04-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-04-03 | 1991-10-03 | 1992-04-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-04-03 | 1995-10-03 | 1996-04-03 | $7700.00 | Window Closed / Lapsed |