US4029480A
Expired / Lapsed
US
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Hydrocarbon fuel compositions containing polysulfone antistatic additives
Assignee: EIDP Inc
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Filing: 1975-08-05
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Granted: 1977-06-14
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Expires: 1995-08-05
Abstract
Abstract Electrically conductive hydrocarbon fuel compositions containing from 0.01 to 40 ppm of an antistatic polysulfone copolymer additive consisting essentially of units derived from sulfur dioxide, C 6 -24 1-alkene and, optionally, an olefin of the formula ##STR1## wherein A is a group having the formula, --(C x H 2x )--COOH, where x is from 0 to 17, and B is hydrogen or carboxyl; and a process for preparing same.
Inventors
- 👤 Thomas E. Johnston
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 00:16
CPC Classifications
C; C10; C10L; C10L1/00; C10L1/10; C10L1/14; C10L1/26; C10L1/2666; C10L1/2675; C08; C08G; C08G65/00; C08G65/02; C08G65/26; C08G65/2618; C08G65/2621; C08G75/00; C08G75/20; C08G75/205; C08G75/22; C10L1/143; C10L1/18; C10L1/1814; C10L1/188; C10L1/22; C10L1/222; C10L1/2222; C10L1/24; C10L1/2406; C10L1/2431; C10L1/2462; C10L1/2468; C10L1/2633; C10L1/2641; C10L1/2658; C10L1/30; C10L1/301
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
144 words
An electrically conductive hydrocarbon fuel composition comprising a normally liquid hydrocarbon fuel, and from 0.01 to 40 ppm of polysulfone copolymer, at an average molecular weight from about 10,000 to 900,000 effective to impart an antistatic property to said fuel consisting essentially of a. about 50 mol percent of units derived from sulfur dioxide, b. from about 40 to 50 mol percent of units derived from at least one 1-alkene having from 6 to 24 carbon atoms, and c. from 0 to about 10 mol percent of units derived from an olefin having the formula ##STR3## wherein A is a group having the formula, -(C x H 2x )-COOH, where x is from 0 to 17, and B is hydrogen or carboxyl, with the proviso that when B is carboxyl, x is 0, and A and B together can be a dicarboxylic anhydride group.
Claim 2
Dependent Claim
144 words
An electrically conductive hydrocarbon fuel composition comprising a normally liquid hydrocarbon fuel, and from 0.01 to 40 ppm of polysulfone copolymer, at an average molecular weight from about 10,000 to 900,000 effective to impart an antistatic property to said fuel consisting essentially of a. about 50 mol percent of units derived from sulfur dioxide, b. from about 40 to 50 mol percent of units derived from at least one 1-alkene having from 6 to 24 carbon atoms, and c. from 0 to about 10 mol percent of units derived from an olefin having the formula ##STR3## wherein A is a group having the formula, -(C x H 2x )-COOH, where x is from 0 to 17, and B is hydrogen or carboxyl, with the proviso that when B is carboxyl, x is 0, and A and B together can be a dicarboxylic anhydride group.
Claim 3
Dependent Claim
24 words
A composition according to claim 1 wherein the normally liquid hydrocarbon fuel boils in the range of from about 70° F to 700° F.
Claim 4
Dependent Claim
21 words
A composition according to claim 1 wherein the average molecular weight of the polysulfone copolymer is from about 50,000 to 700,000.
Claim 5
Dependent Claim
21 words
A composition according to claim 1 wherein the average molecular weight of the polysulfone copolymer is from about 100,000 to 500,000.
Claim 6
Dependent Claim
13 words
A composition according to Claim 1 wherein the polysulfone copolymer is 1-decene polysulfone.
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) | 1980-06-13 | 1980-12-13 | 1981-06-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-06-13 | 1984-12-13 | 1985-06-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-06-13 | 1988-12-13 | 1989-06-14 | $7700.00 | Window Closed / Lapsed |