Patent US5000339A successfully refreshed from Google Patents.
Patent US3661541A successfully refreshed from Google Patents.
US3661541A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fuel oil compositions containing a mixture of polymers to improve the pour point and flow properties
Assignee: ExxonMobil Technology and Engineering Co
•
Filing: 1969-04-22
•
Granted: 1972-05-09
•
Expires: 1989-04-22
Abstract
Abstract Mixtures containing (1) polymers of ethylene with polar monomers such as vinyl acetate, methyl methacrylate, ethyl fumarate, etc., and (2) homopolymers of ethylene or copolymers of ethylene with C3 - C18 alpha-olefins synergistically improve the pour point and flow characteristics of middle distillate petroleum oils.
Inventors
- 👤 William C Hollyday Jr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 19:08
CPC Classifications
C; C10; C10L; C10L1/00; C10L1/10; C10L1/14; C10L1/146; C10L1/16; C10L1/1625; C10L1/1633; C10L1/1641; C10L1/18; C10L1/192; C10L1/195; C10L1/196; C10L1/1963; C10L1/1966; C10L1/197; C10L1/1973
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
19 words
An oil according to claim 1, wherein said component (a) is a polymer comprised of ethylene and vinyl acetate.
Claim 2
Dependent Claim
44 words
An oil according to claim 1, wherein said component (a) is a polymer comprised of ethylene and an ethylenically unsaturated ester having the formula: wherein X is a hydrogen atom or methyl and Y is: wherein R is a C1 to C14 alkyl group.
Claim 3
Dependent Claim
17 words
An oil according to claim 2 wherein said component (b) is a copolymer of ethylene and propylene.
Claim 4
Dependent Claim
46 words
An oil according to claim 2 wherein said component (b) is a copolymer of about 74 to 95 mole percent ethylene and about 5 to 26 mole percent propylene and said oil-soluble polymers have number average molecular weights within the range between about 1,250 and 7,500.
Claim 5
Dependent Claim
14 words
A composition according to claim 2 wherein said ethylenically unsaturated ester component is isobutylacrylate.
Claim 6
Dependent Claim
91 words
An oil composition comprising a major proportion of a petroleum distillate fuel boiling in the range of 250* to 750* F. and about 0.005 to 2.0 weight percent of a synergistic mixture containing (a) an oil-soluble polymer comprised of about 4.6 to 18 molar proportions of ethylene per molar proportion of vinyl acetate; and (b) an oil-soluble polymer comprised of about 74 to 95 mole percent ethylene and about 5 to 26 mole percent of propylene; said polymers having number average molecular weights within the range between about 1250 and 7500.
Claim 7
Dependent Claim
32 words
A concentrate comprising from about 20 to about 80 wt. % of a hydrocarbon solvent and from about 20 to about 80 wt. % of the synergistic mixture defined by claim 1.
Claim 8
Dependent Claim
32 words
A concentrate comprising from about 20 to about 80 weight percent of a hydrocarbon solvent and from about 20 to about 80 weight percent of the synergistic mixture defined by claim 2.
References Cited (Backward Citations)
US3126364A
Cited
US2379728A
Cited
US2615845A
Cited
GB993744A
Cited
US3254063A
Cited
US3250599A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-05-09 | 1975-11-08 | 1976-05-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-05-09 | 1979-11-08 | 1980-05-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-05-09 | 1983-11-08 | 1984-05-09 | $7700.00 | Window Closed / Lapsed |