Patent US4419106A successfully refreshed from Google Patents.
US4419106A
Expired / Lapsed
US
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Hydrocarbon oils with improved pour points
Assignee: Atlantic Richfield Co
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Filing: 1982-02-02
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Granted: 1983-12-06
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Expires: 2002-02-02
Abstract
Abstract Hydrocarbon oils containing, as a pour point depressant, a copolymer of an alkyl acrylate, the alkyl group of which contains about 12 to 40 carbon atoms and an alpha-monoolefin having about 12 to 40 carbon atoms, the copolymer having a weight average molecular weight of about 3000 to 50,000.
Inventors
- 👤 Richard F. Miller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 18:06
CPC Classifications
C; C10; C10L; C10L1/00; C10L1/10; C10L1/14; C10L1/18; C10L1/192; C10L1/195; C10L1/196; C10L1/1963; C08; C08F; C08F220/00; C08F220/02; C08F220/10; C08F220/12; C08F220/16; C08F220/18; C08F220/1818
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
73 words
An oil composition comprising a hydrocarbon oil and a pour depressing amount of a copolymer of about 10 to 90 parts by weight of alkyl acrylate units containing about 8 to 30 alkyl carbon atoms and about 90 to 10 parts by weight of alpha-monoolefin units having about 12 to 40 carbon atoms per 100 parts by weight of copolymer, said copolymer having a weight average molecular weight of about 1,000 to 100,000.
Claim 2
Dependent Claim
73 words
An oil composition comprising a hydrocarbon oil and a pour depressing amount of a copolymer of about 10 to 90 parts by weight of alkyl acrylate units containing about 8 to 30 alkyl carbon atoms and about 90 to 10 parts by weight of alpha-monoolefin units having about 12 to 40 carbon atoms per 100 parts by weight of copolymer, said copolymer having a weight average molecular weight of about 1,000 to 100,000.
Claim 3
Dependent Claim
52 words
The composition of claim 1 wherein said alkyl acrylate contains 16 to 28 alkyl carbon atoms and said alpha-monoolefin contains about 16 to 3 carbon atoms and said copolymer is present in said composition at a concentration of about 0.001 to 5.0 weight percent, based on the total weight of the composition.
Claim 4
Dependent Claim
40 words
The composition of claims 1 or 2 wherein said copolymer is about 30 to 60 parts by weight of alkyl acrylate units and about 70 to 40 parts by weight of alpha-monoolefin units per 100 parts by weight of copolymer.
Claim 5
Dependent Claim
20 words
The composition of claims 1 or 2 wherein the weight average molecular weight of the copolymer is 3,000 to 50,000.
Claim 6
Dependent Claim
18 words
The composition of claim 3 wherein the weight average molecular weight of the copolymer is 3,000 to 50,000.
Claim 7
Dependent Claim
30 words
The composition of claim 4 wherein the copolymer is present in said composition at a concentration of about 0.005 to 1%, based on the total weight of the oil composition.
Claim 8
Dependent Claim
29 words
The composition of claim 5 wherein the copolymer is present in said composition at a concentration of about 0.005 to 1%, based on the total weight of the composition.
Claim 9
Dependent Claim
88 words
An oil composition comprised of a hydrocarbon fuel oil and a copolymer of about 25 to 75 parts of units of at least one alkyl acrylate containing 16 to 28 alkyl carbon atoms and about 25 to 80 parts of units of at least one alpha-monoolefin containing about 16 to 30 carbon atoms, the copolymer having a weight average molecular weight of about 3,000 to 50,000 and being present in the composition at a concentration of about 0.005 to 1%, based on the total weight of the composition.
Claim 10
Dependent Claim
88 words
An oil composition comprised of a hydrocarbon fuel oil and a copolymer of about 25 to 75 parts of units of at least one alkyl acrylate containing 16 to 28 alkyl carbon atoms and about 25 to 80 parts of units of at least one alpha-monoolefin containing about 16 to 30 carbon atoms, the copolymer having a weight average molecular weight of about 3,000 to 50,000 and being present in the composition at a concentration of about 0.005 to 1%, based on the total weight of the composition.
Claim 11
Dependent Claim
46 words
The composition of claim 8 wherein the alkyl acrylate is selected from the group consisting of n-octadecyl acrylate, n-eicosyl acrylate, n-docosyl acrylate, tetracosyl acrylate and mixtures of these and the alpha-monoolefin is selected from the group consisting of 1-octene, 1-eicosene, 1-docosene, 1-tetracosene and mixtures of these.
Claim 12
Dependent Claim
17 words
The composition of claim 9 where the alkyl acrylate is octadecyl acrylate and the alpha-monoolefin is 1-octene.
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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) | 1986-12-05 | 1987-06-06 | 1987-12-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-12-05 | 1991-06-06 | 1991-12-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-12-05 | 1995-06-06 | 1995-12-06 | $7700.00 | Window Closed / Lapsed |