Patent US4197409A successfully refreshed from Google Patents.
US4197409A
Expired / Lapsed
US
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Poly(oxyalkylene)aminocarbomates of alkylene polyamine
Assignee: Chevron USA Inc
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Filing: 1978-08-08
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Granted: 1980-04-08
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Expires: 1998-08-08
Abstract
Abstract Fuel compositions for internal combustion engines are provided containing deposit control additives which maintain cleanliness of intake systems without contributing to combustion chamber deposits. The additives are hydrocarbylpoly(oxyalkylene)aminocarbamates comprising a hydrocarbyl-terminated poly(oxyalkylene) moiety composed of 2-5 carbon oxyalkylene units and one or more 9-30 carbon oxyalkylene groups. Certain additives also find use as dispersants in lubricating oils.
Inventors
- 👤 Jennifer E. Lilburn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 06:45
CPC Classifications
C; C10; C10L; C10L1/00; C10L1/10; C10L1/14; C10L1/22; C10L1/222; C10L1/224; C10M; C10M133/00; C10M133/02; C10M133/16; C10M133/18; C10M2209/00; C10M2209/02; C10M2209/10; C10M2209/103; C10M2215/00; C10M2215/02; C10M2215/04; C10M2215/042; C10M2217/00; C10M2217/04; C10M2217/042; C10M2217/043; C10N; C10N2070/00; C10N2070/02
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
119 words
Compounds suitable for use as deposit control additives in fuels or dispersant additives in lubricating oils are hydrocarbyl poly(oxyalkylene) aminocarbamates having a molecular weight of from about 600 to 10,000, at least one C 1 -C 30 hydrocarbyl-terminated poly(oxyalkylene) chain and at least one basic nitrogen atom; wherein said poly(oxyalkylene) chain comprises from 1 to 5 oxyalkylene units each containing from 9 to 30 carbon atoms and other oxyalkylene units selected from 2 to 5 carbon oxyalkylene units; and wherein the amine moiety of said aminocarbamate is a polyalkylene polyamine wherein the alkylene group contains from 2 to 6 carbon atoms and the polyamine contains from 2 to 12 amine nitrogen atoms and from 2 to 24 carbon atoms.
Claim 2
Dependent Claim
119 words
Compounds suitable for use as deposit control additives in fuels or dispersant additives in lubricating oils are hydrocarbyl poly(oxyalkylene) aminocarbamates having a molecular weight of from about 600 to 10,000, at least one C 1 -C 30 hydrocarbyl-terminated poly(oxyalkylene) chain and at least one basic nitrogen atom; wherein said poly(oxyalkylene) chain comprises from 1 to 5 oxyalkylene units each containing from 9 to 30 carbon atoms and other oxyalkylene units selected from 2 to 5 carbon oxyalkylene units; and wherein the amine moiety of said aminocarbamate is a polyalkylene polyamine wherein the alkylene group contains from 2 to 6 carbon atoms and the polyamine contains from 2 to 12 amine nitrogen atoms and from 2 to 24 carbon atoms.
Claim 3
Dependent Claim
12 words
The compound of claim 1 in which said polyamine is ethylene diamine.
Claim 4
Dependent Claim
11 words
The compound of claim 1 in which said polyamine is dimethylaminopropylenediamine.
Claim 5
Dependent Claim
11 words
The compound of claim 1 in which said amine is diethylenetriamine.
Claim 6
Dependent Claim
11 words
The compound of claim 1 in which said polyamine is triethylenetetramine.
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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) | 1983-04-08 | 1983-10-08 | 1984-04-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-04-08 | 1987-10-08 | 1988-04-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-04-08 | 1991-10-08 | 1992-04-08 | $7700.00 | Window Closed / Lapsed |