US4288612A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Deposit control additives
Assignee: Chevron USA Inc
•
Filing: 1980-04-28
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Granted: 1981-09-08
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Expires: 2000-04-28
Abstract
Abstract Deposit control additives for internal combustion engines are provided which maintain cleanliness of intake systems withcut contributing to combustion chamber deposits. The additives are hydrocarbylpoly(oxyalkylene) aminocarbamates comprising a hydrocarbyl-terminated poly(oxyalkylene) chain of 2-5 carbon oxyalkylene units bonded through an oxycarbonyl group to a nitrogen atom of a diamine.
Inventors
- 👤 Robert A. Lewis
- 👤 Lewis R. Honnen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 09:57
CPC Classifications
C; C10; C10L; C10L1/00; C10L1/10; C10L1/14; C10L1/22; C10L1/222; C10L1/224; C08; C08G; C08G65/00; C08G65/02; C08G65/32; C08G65/329; C08G65/333; C08G65/33303; C08G65/3331; C08L; C08L71/00; C08L71/02; C10L1/143; C10L1/232; C10L10/00; C10L10/04; F; F02; F02B; F02B77/00; F02B77/04; F02M; F02M25/00
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
79 words
A hydrocarbylpoly(oxyalkylene) aminocarbamate having a molecular weight of about 600-10,000 and at least one primary or secondary amino group; wherein said hydrocarbylpoly(oxyalkylene) moiety is composed of oxyalkylene units selected from C 2 -C 5 oxyalkylene units of which a sufficient number are branched-chain oxyalkylene units to render said carbamates soluble in liquid hydrocarbons; said hydrocarbyl group contains from 1 to 30 carbon atoms; and said amine moiety is derived from an ethylene diamine from 1 to 24 carbon atoms.
Claim 2
Dependent Claim
79 words
A hydrocarbylpoly(oxyalkylene) aminocarbamate having a molecular weight of about 600-10,000 and at least one primary or secondary amino group; wherein said hydrocarbylpoly(oxyalkylene) moiety is composed of oxyalkylene units selected from C 2 -C 5 oxyalkylene units of which a sufficient number are branched-chain oxyalkylene units to render said carbamates soluble in liquid hydrocarbons; said hydrocarbyl group contains from 1 to 30 carbon atoms; and said amine moiety is derived from an ethylene diamine from 1 to 24 carbon atoms.
Claim 3
Dependent Claim
55 words
The hydrocarbylpoly(oxyalkylene) aminocarbamate of claim 1 wherein said diamine is substituted with substituents selected from (A) hydrogen, (B) hydrocarbyl groups of from 1 to about 10 carbon atoms, (C) acyl groups of from 2 to about 10 carbon atoms, and (D) monoketo, monohydroxy, mononitro, monocyano, lower alkyl and lower alkoxy derivatives of (B) and (C).
Claim 4
Dependent Claim
15 words
The hydrocarbylpoly(oxyalkylene) aminocarbamate of claim 1 having a molecular weight of about 1,200 to 5,000.
Claim 5
Dependent Claim
20 words
The hydrocarbylpoly(oxyalkylene) aminocarbamate of claim 1 wherein said oxyalkylene units are selected from C 3 -C 4 carbon oxyalkylene units.
Claim 6
Dependent Claim
13 words
The hydrocarbylpoly(oxyalkylene) aminocarbamate of claim 4 wherein said oxyalkylene units are oxybutylene units.
Claim 7
Dependent Claim
17 words
The hydrocarbylpoly(oxyalkylene) aminocarbamate of claim 1 wherein said hydrocarbyl group is an alkyl or an alkylphenyl group.
Claim 8
Dependent Claim
14 words
The hydrocarbylpoly(oxyalkylene) aminocarbamate of claim 1 wherein said hydrocarbyl group is a butyl group.
Claim 9
Dependent Claim
21 words
The hydrocarbylpoly(oxyalkylene) aminocarbamate of claim 1 wherein said hydrocarbyl group is an alkylphenyl group of from 7 to 24 carbon atoms.
Claim 10
Dependent Claim
14 words
The hydrocarbylpoly(oxyalkylene) aminocarbamate of claim 8 in which said alkyl substituent is propylene tetramer.
Claim 11
Dependent Claim
144 words
A compound of the formula ##STR5## wherein n is 2, g is an integer from 2 to 5, j is an integer such that the molecular weight of the compound is in the range of about 600 to about 5,000, R is a hydrocarbyl group of from 1 to 30 carbon atoms; R 1 , R 2 , R 3 , and R 4 are the same or different monovalent substituents selected from the group consisting of (A) hydrogen, (B) hydrocarbyl groups of from 1 to about 10 carbon atoms, (C) acyl groups of from 2 to about 10 carbon atoms, and (D) monoketo, monohydroxy, mononitro, monocyano, lower alkyl and lower alkoxy derivatives of (B) and (C); and at least a sufficient number of the oxyalkylene units, (OC g H 2g ), are branched-chain oxyalkylene units to render said compound soluble in liquid hydrocarbons.
Claim 12
Dependent Claim
144 words
A compound of the formula ##STR5## wherein n is 2, g is an integer from 2 to 5, j is an integer such that the molecular weight of the compound is in the range of about 600 to about 5,000, R is a hydrocarbyl group of from 1 to 30 carbon atoms; R 1 , R 2 , R 3 , and R 4 are the same or different monovalent substituents selected from the group consisting of (A) hydrogen, (B) hydrocarbyl groups of from 1 to about 10 carbon atoms, (C) acyl groups of from 2 to about 10 carbon atoms, and (D) monoketo, monohydroxy, mononitro, monocyano, lower alkyl and lower alkoxy derivatives of (B) and (C); and at least a sufficient number of the oxyalkylene units, (OC g H 2g ), are branched-chain oxyalkylene units to render said compound soluble in liquid hydrocarbons.
Claim 13
Dependent Claim
27 words
The compound of claim 10 in which R 1 , R 2 , R 3 and R 4 are H, j is 5-25, and g is 4.
Claim 14
Dependent Claim
27 words
The hydrocarbyl poly(oxyalkylene) aminocarbamate of claims 1, 2, 3, 4, 5, 6, 7, 8, or 9 wherein the ethylene diamine is from 2 to 6 carbon atoms.
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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) | 1984-09-07 | 1985-03-09 | 1985-09-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-09-07 | 1989-03-09 | 1989-09-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-09-07 | 1993-03-09 | 1993-09-08 | $7700.00 | Window Closed / Lapsed |