US3876704A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Detergent automotive fuel composition
Assignee: Union Oil Company of California
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Filing: 1973-08-09
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Granted: 1975-04-08
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Expires: 1993-08-09
Abstract
Abstract Certain N-long-branched-chain alkyl, N-hydroxyalkyl alkylene polyamines, when added to automotive hydrocarbon fuels in very small proportions, are found to provide remarkably effective detergents for removing and preventing the formation of gums and other deposits in fuel induction systems. These additives are also found to exhibit a substantially lesser tendency to emulsify water in the fuel than other presumably analogous compositions.
Inventors
- 👤 Glenn M Nakaguchi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 15:34
CPC Classifications
C; C10; C10L; C10L1/00; C10L1/10; C10L1/14; C10L1/22; C10L1/234; C10L1/238; C10L1/2383; C10L1/2387; C08; C08F; C08F8/00; C08F8/30; C08F8/32
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
110 words
A DETERGENT MIXTURE OF ALKYLATED N-HYDROXYALKYL POLYAMINES OBTAINED BY THE REACTION OF ABOUT ONE MOLE RATIO OF A CHLORINATED POLYOLEFIN SELECTED FROM THE CLASS CONSISTING OF POLYISOBUTYLENE, POLYPROPYLENE AND COPOLYMERS THEREOF HAVING A MOLECULAR WEIGHT BETWEEN ABOUT 400 AND 4000, WITH ABOUT 2-15 MOLE RATIOS OF A POLYAMINE SELECTED FROM THE CLASS CONSISTING OF N-(2-HYDROXYETHYL) ETHYLENEDIAMINE AND N-(3HYDROXYPROPYL) ETHYLENEDIAMINE, SAID CHLORINATED POLYOLEFIN CONTAINING AN AVERAGE OF ABOUT 1-4 CHLORINE ATOMS PER MOLECULE, SAID REACTION BEING CARRIED OUT AT A TEMPERATURE BETWEEN ABOUT 90* AND 140*C FOR A SUFFICIENT TIME TO DISPLACE AT LEAST ABOUT 60% OF SAID CHLORINE ATOMS, AND THEREAFTER SEPARATING UNREACTED POLYAMINE AND DISPLACED CHLORINE FROM THE MIXTURE.
Claim 2
Dependent Claim
110 words
A DETERGENT MIXTURE OF ALKYLATED N-HYDROXYALKYL POLYAMINES OBTAINED BY THE REACTION OF ABOUT ONE MOLE RATIO OF A CHLORINATED POLYOLEFIN SELECTED FROM THE CLASS CONSISTING OF POLYISOBUTYLENE, POLYPROPYLENE AND COPOLYMERS THEREOF HAVING A MOLECULAR WEIGHT BETWEEN ABOUT 400 AND 4000, WITH ABOUT 2-15 MOLE RATIOS OF A POLYAMINE SELECTED FROM THE CLASS CONSISTING OF N-(2-HYDROXYETHYL) ETHYLENEDIAMINE AND N-(3HYDROXYPROPYL) ETHYLENEDIAMINE, SAID CHLORINATED POLYOLEFIN CONTAINING AN AVERAGE OF ABOUT 1-4 CHLORINE ATOMS PER MOLECULE, SAID REACTION BEING CARRIED OUT AT A TEMPERATURE BETWEEN ABOUT 90* AND 140*C FOR A SUFFICIENT TIME TO DISPLACE AT LEAST ABOUT 60% OF SAID CHLORINE ATOMS, AND THEREAFTER SEPARATING UNREACTED POLYAMINE AND DISPLACED CHLORINE FROM THE MIXTURE.
Claim 3
Dependent Claim
19 words
A product as defined in claim 1 wherein said polyolefin has a molecular weight between about 550 and 2000.
References Cited (Backward Citations)
US3438757A
Cited
US3657347A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-04-07 | 1978-10-07 | 1979-04-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-04-07 | 1982-10-07 | 1983-04-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-04-07 | 1986-10-07 | 1987-04-08 | $7700.00 | Window Closed / Lapsed |