US3884947A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydrocarbon fuel compositions
Assignee: Citgo Petroleum Corp
•
Filing: 1973-04-18
•
Granted: 1975-05-20
•
Expires: 1993-04-18
Abstract
Abstract Carboxylic acid salts of polyamides having at least one amino group and hydrocarbon fuel compositions containing same. The salts are formed by neutralizing with a carboxylic acid at least 10% of the amino groups of a polyamide containing from about 2 to about 6 amide groups and at least one amino group. Hydrocarbon fuel compositions containing these salts exhibit desirable properties such as enhanced carburetor detergency and carburetor anti-icing characteristics, improved water tolerance, improved anti-corrosion properties, and cleaner engine operation.
Inventors
- 👤 Elmer J Badin
- 👤 Paul M Kerschner
- 👤 Aldo Cresti
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 12:43
CPC Classifications
C; C10; C10L; C10L1/00; C10L1/10; C10L1/14; C10L1/22; C10L1/222; C10L1/224; C10L1/234; C10L1/238; C10L1/2383; F; F02; F02B; F02B77/00; F02B77/04
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
10 words
A CARBOXYLIC ACID SALT OF A COMPOUND HAVING THE FORMULA
Claim 2
Dependent Claim
10 words
A CARBOXYLIC ACID SALT OF A COMPOUND HAVING THE FORMULA
Claim 3
Dependent Claim
81 words
The compound of claim 1 wherein R is a multivalent hydrocarbon group of about 4 to about 34 carbons, R'' is a hydrocarbylene group of about 2 to about 6 carbons, R'''' is selected from the group consisting of hydrogen and hydrocarbyl groups of about 3 to about 24 carbons, R'''''' is a hydrocarbyl group of about 2 to about 6 carbons, and about 50% to about 90% of the amino groups contained therein are converted to the carboxylic acid salt.
Claim 4
Dependent Claim
13 words
The compound of claim 1 wherein n is zero and m is 2.
Claim 5
Dependent Claim
13 words
The compound of claim 2 wherein n is zero and m is 2.
Claim 6
Dependent Claim
13 words
A Carboxylic acid salt of a compound selected from the group consisting of
Claim 7
Dependent Claim
13 words
A Carboxylic acid salt of a compound selected from the group consisting of
Claim 8
Dependent Claim
24 words
The compound of claim 1 wherein the salt-forming carboxylic acid contains a functional group selected from the group consisting of hydroxyl and hydrocarbyloxy groups.
Claim 9
Dependent Claim
14 words
The compound of claim 5 wherein the salt-forming carboxylic acid is 10-(hydroxyphenyl) stearic acid.
References Cited (Backward Citations)
US2718503A
Cited
US2908584A
Cited
US2955951A
Cited
US3219666A
Cited
US3224893A
Cited
US3232896A
Cited
US3462284A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-05-19 | 1978-11-18 | 1979-05-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-05-19 | 1982-11-18 | 1983-05-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-05-19 | 1986-11-18 | 1987-05-20 | $7700.00 | Window Closed / Lapsed |