Patent FR435364A successfully refreshed from Google Patents.
Patent US4288612A successfully refreshed from Google Patents.
US4288612A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Deposit control additives
Assignee: Chevron USA Inc
•
Filing: 1980-04-28
•
Granted: 1981-09-08
•
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 10:10
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.
References Cited (Backward Citations)
US2991162A
Cited
US3359303A
Cited
US3438757A
Cited
US3454625A
Cited
US3565592A
Cited
US3813341A
Cited
US3652240A
Cited
US3671511A
Cited
US3658882A
Cited
US3786081A
Cited
US3960515A
Cited
BE855961A
Cited
US4160648A
Cited
US4191537A
Cited
US4198306A
Cited
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 |