Patent US4015952A successfully refreshed from Google Patents.
US4015952A
Expired / Lapsed
US
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Liquid hydrocarbon compositions of improved behavior in the cold and containing diene polymers
Assignee: IFP Energies nouvelles
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Filing: 1974-11-27
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Granted: 1977-04-05
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Expires: 1994-11-27
Abstract
Abstract The behavior in the cold of crude oil or petroleum distillates may be improved by incorporation of polymeric substances such as a hydrogenated polybutadiene or a hydrogenated copolymer of butadiene with at least one conjugated aliphatic diolefin of 5-8 carbon atoms. The additive is active at concentrations of from 10 to 1,000 grams per m3 of oil.
Inventors
- 👤 Jean-Pierre Durand
- 👤 Bernard Aubin
- 👤 Francois Dawans
- 👤 Gilbert Chapelet
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 16:42
CPC Classifications
C; C10; C10L; C10L1/00; C10L1/10; C10L1/14; C10L1/16; C10L1/1625; C10L1/1633; C10L1/1658; C08; C08C; C08C19/00; C08C19/02
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
78 words
A composition comprising a major portion of a petroleum middle distillate and an amount sufficient to improve its filterability in the cold of at least one partially hydrogenated 1,3-butadiene homopolymer having essentially function-free terminal groups, which has: a. a microstructure, as determined before hydrogenation, of at least about 90% of 1,4-addition units; b. an average molecular weight by number of 500 to 20,000 and c. an olefinic unsaturation ratio of 5-80% of the units constituting the polymeric chain.
Claim 2
Dependent Claim
78 words
A composition comprising a major portion of a petroleum middle distillate and an amount sufficient to improve its filterability in the cold of at least one partially hydrogenated 1,3-butadiene homopolymer having essentially function-free terminal groups, which has: a. a microstructure, as determined before hydrogenation, of at least about 90% of 1,4-addition units; b. an average molecular weight by number of 500 to 20,000 and c. an olefinic unsaturation ratio of 5-80% of the units constituting the polymeric chain.
Claim 3
Dependent Claim
27 words
A composition according to claim 1, wherein said partially hydrogenated 1,3-butadiene homopolymer has an olefinic unsaturation ratio of 20-70% of the units contained in the polymeric chain.
Claim 4
Dependent Claim
24 words
A composition according to claim 1, wherein said partially hydrogenated 1,3-butadiene homopolymer has an average molecular weight by number of from 1,000 to 10,000.
Claim 5
Dependent Claim
21 words
A composition according to claim 1, wherein the proportion of said partially hydrogenated 1,3-butadiene homopolymer is 10-1,000 g/m 3 of composition.
Claim 6
Dependent Claim
20 words
A composition according to claim 1, wherein the proportion said partially hydrogenated 1,3-butadiene homopolymer is 50-500 g/m 3 of composition.
Claim 7
Dependent Claim
14 words
A composition according to claim 1, said composition comprising a major proportion of gas-oil.
Claim 8
Dependent Claim
14 words
A composition according to claim 1, said composition comprising a major proportion of fuel-oil.
Claim 9
Dependent Claim
24 words
A composition according to claim 2, wherein said partially hydrogenated 1,3-butadiene homopolymer has an average molecular weight by number of from 1,000 to 10,000.
Claim 10
Dependent Claim
19 words
A composition according to claim 1, wherein said homopolymer has a number average molecular weight of 1,000 to 5,000.
Claim 11
Dependent Claim
23 words
A composition according to claim 1 wherein said homopolymer has an olefinic unsaturation ratio of at least about 17% and less than 70%.
Claim 12
Dependent Claim
19 words
A composition according to claim 10, wherein said homopolymer has an olefinic unsaturation ratio of at least about 44%.
Claim 13
Dependent Claim
9 words
A composition according to claim 1 being substantially solvent-free.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-04-04 | 1980-10-04 | 1981-04-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-04-04 | 1984-10-04 | 1985-04-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-04-04 | 1988-10-04 | 1989-04-05 | $7700.00 | Window Closed / Lapsed |