US4010006A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flow improvers
Assignee: ExxonMobil Technology and Engineering Co
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Filing: 1973-10-18
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Granted: 1977-03-01
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Expires: 1993-10-18
Abstract
Abstract Polymer blends suitable as flow improvers for crude oils, comprising a polymer having a plurality of linear paraffinic C 18 + side chains, and a copolymer of ethylene and an ethylenically unsaturated compound having no such side chains.
Inventors
- 👤 Roger Charles Price
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 00:18
CPC Classifications
C; C10; C10L; C10L1/00; C10L1/10; C10L1/14; C10L1/146; C08; C08L; C08L57/00; C08L67/00; C08L67/08; C08L77/00; C08L77/06; C10L1/16; C10L1/1625; C10L1/1633; C10L1/1641; C10L1/165; C10L1/18; C10L1/192; C10L1/195; C10L1/1955; C10L1/196; C10L1/1963; C10L1/1966; C10L1/197; C10L1/1973; C10L1/198; C10L1/1983; C10L1/20; C10L1/206; C10L1/207; C10L1/22; C10L1/234; C10L1/236; C10L1/238; C10L1/24; C10L1/2462; C10L1/2468
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
179 words
A fuel oil comprising 35 to 100 wt. % residue from the distillation of crude oil which is improved in its flow properties by containing in the range of about 0.01 to about 1 wt. % of a synergistic flow improving combination of a polymer blend comprising: a first polymer which is an oil soluble flow improving copolymer of ethylene and vinyl acetate having a molecular weight in a range of about 1000 to about 60,000 and containing about 86 to 97 mol % of ethylene; in combination with a second oil soluble flow improving polymer which is acyl polystyrene having a number average molecular weight in the range of 1000 to 25,000 and wherein at least half of said styrene units are acylated with C 22 -C 30 straight chain acyl groups; and wherein the weight ratio of said second polymer to said first polymer is in the range of about 5:1 to 1:5, said synergistic combination in said oil giving a pour point improvement greater than a like amount of either said first or second polymer alone.
Claim 2
Dependent Claim
179 words
A fuel oil comprising 35 to 100 wt. % residue from the distillation of crude oil which is improved in its flow properties by containing in the range of about 0.01 to about 1 wt. % of a synergistic flow improving combination of a polymer blend comprising: a first polymer which is an oil soluble flow improving copolymer of ethylene and vinyl acetate having a molecular weight in a range of about 1000 to about 60,000 and containing about 86 to 97 mol % of ethylene; in combination with a second oil soluble flow improving polymer which is acyl polystyrene having a number average molecular weight in the range of 1000 to 25,000 and wherein at least half of said styrene units are acylated with C 22 -C 30 straight chain acyl groups; and wherein the weight ratio of said second polymer to said first polymer is in the range of about 5:1 to 1:5, said synergistic combination in said oil giving a pour point improvement greater than a like amount of either said first or second polymer alone.
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) | 1980-02-29 | 1980-08-30 | 1981-03-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-02-29 | 1984-08-30 | 1985-03-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-02-29 | 1988-08-30 | 1989-03-01 | $7700.00 | Window Closed / Lapsed |