Patent US4302215A successfully refreshed from Google Patents.
US4302215A
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Deposit control additives and their fuel compositions
Assignee: Chevron USA Inc
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Filing: 1978-11-13
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Granted: 1981-11-24
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Expires: 1998-11-13
Abstract
Abstract Hydrocarbyl carbonates and their fuel compositions are provided. The hydrocarbyl carbonates are deposit control additives in gasoline compositions.
Inventors
- 👤 Robert A. Lewis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 19:46
CPC Classifications
C; C10; C10M; C10M133/00; C10M133/52; C10M133/54; C08; C08F; C08F8/00; C08F8/04; C08F8/08; C08F8/18; C08F8/20; C08F8/26; C10L; C10L1/00; C10L1/10; C10L1/14; C10L1/18; C10L1/192; C10L1/198; C10L1/22; C10L1/234; C10L1/238; C10M129/00; C10M129/86; C10M129/95; C10M2207/00; C10M2207/28; C10M2207/30; C10M2207/32; C10M2215/00; C10M2215/02; C10M2215/04; C10M2215/042; C10N; C10N2070/00; C10N2070/02
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
47 words
A hydrocarbyl carbonate comprising a hydrocarbyl group of from 500 to 10,000 molecular weight and the hydroxyl and/or a tertiary amino-containing group of from about 80 to about 700 molecular weight, wherein said hydrocarbyl group is a polyalkylene group comprised of C 2 -C 6 alkylene units.
Claim 2
Dependent Claim
47 words
A hydrocarbyl carbonate comprising a hydrocarbyl group of from 500 to 10,000 molecular weight and the hydroxyl and/or a tertiary amino-containing group of from about 80 to about 700 molecular weight, wherein said hydrocarbyl group is a polyalkylene group comprised of C 2 -C 6 alkylene units.
Claim 3
Dependent Claim
17 words
A hydrocarbyl carbonate according to claim 1 wherein said polyalkylene group is a polybutylene or polypropylene group.
Claim 4
Dependent Claim
24 words
A hydrocarbyl carbonate according to claim 1 wherein said hydroxyl and/or tertiary amino-containing group is derived from a polyol, amino alcohol or polyamino polyol.
Claim 5
Dependent Claim
19 words
A hydrocarbyl carbonate according to claim 1 wherein said hydrocarbyl group is of from 800 to 2000 molecular weight.
Claim 6
Dependent Claim
22 words
A hydrocarbyl carbonate according to claim 1 wherein said hydroxyl and/or tertiary amino-containing groups are derived from trimethylolpropane, triethanolamine, N,N,N',N'-tetra(2-hydroxypropyl)ethylenediamine, and dimethylaminoethanol.
Claim 7
Dependent Claim
33 words
A fuel composition comprising a major amount of hydrocarbons boiling in the gasoline range and from 30 to 2000 ppm of one or more compounds of Claims 1, 3, 4, 5 or 6.
Claim 8
Dependent Claim
32 words
A concentrate comprising an inert stable oleophilic organic solvent boiling in the range of about 150° to 400° F. and from 10 to 25 weight percent of the compound of claim 1.
Claim 9
Dependent Claim
23 words
A concentrate according to claim 7 where there is also present 5 to 80 weight percent of a poly(oxyalkylene) alcohol, glycol or polyol.
Claim 10
Dependent Claim
23 words
The fuel composition of claim 6 which contains in addition from 100 to 5000 ppm of a fuel-soluble poly(oxyalkylene) alcohol, glycol or polyol.
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) | 1984-11-23 | 1985-05-25 | 1985-11-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-11-23 | 1989-05-25 | 1989-11-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-11-23 | 1993-05-25 | 1993-11-24 | $7700.00 | Window Closed / Lapsed |