US3660057A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Increasing low temperature flowability of middle distillate fuel
Assignee: ExxonMobil Technology and Engineering Co
•
Filing: 1969-03-17
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Granted: 1972-05-02
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Expires: 1989-03-17
Abstract
Abstract The low temperature flowability of a middle distillate petroleum fuel oil, boiling within the range of about 250* to about 700* F. at atmospheric pressure is improved by adding to the fuel oil from about 0.001 to about 1.0 wt. % of a flow improving additive such as a copolymer of ethylene with another ethylenically unsaturated monomer such as an unsaturated ester or an alpha olefin, along with from about 0.01 to about 0.099 wt. % of an essentially saturated hydrocarbon fraction which is substantially free of normal paraffinic hydrocarbons and which has a number average molecular weight in the range of about 600 to about 3000.
Inventors
- 👤 Stephan Ilnyckyj
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 10:31
CPC Classifications
C; C10; C10L; C10L1/00; C10L1/10; C10L1/14; C10L1/143; C10L1/16; C10L1/1616; 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; C10L1/22; C10L1/234; C10L1/236; C10L1/2368
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
21 words
Improved petroleum distillate fuel as defined by claim 1 wherein said copolymer is a copolymer of ethylene and an unsaturated ester.
Claim 2
Dependent Claim
19 words
Improved distillate fuel as defined by claim 1 wherein said copolymer is a copolymer of ethylene and vinyl acetate.
Claim 3
Dependent Claim
26 words
Improved petroleum distillate fuel as defined by claim 1 wherein said copolymer is a terpolymer of ethylene, vinyl acetate, and aliphatic alcohol diester of fumaric acid.
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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) | 1975-05-02 | 1975-11-01 | 1976-05-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-05-02 | 1979-11-01 | 1980-05-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-05-02 | 1983-11-01 | 1984-05-02 | $7700.00 | Window Closed / Lapsed |