US4865622A
Expired / Lapsed
US
⏱️ 0.0 years remaining
ORI-inhibited and deposit-resistant motor fuel composition
Assignee: Texaco Inc
•
Filing: 1989-01-27
•
Granted: 1989-09-12
•
Expires: 2009-01-27
Abstract
Abstract A motor fuel composition which inhibits engine ORI and resists engine deposit formation comprises a mixture of hydrocarbons boiling in the range of 90° F.-450° F. and the reaction product of a dibasic acid anhydride, a polyoxyalkylene diamine, and a heterocyclic azole.
Inventors
- 👤 Rodney L. Sung
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 14:45
CPC Classifications
C; C10; C10L; C10L1/00; C10L1/10; C10L1/14; C10L1/22; C10L1/232; C10L1/221
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
110 words
A motor fuel composition comprising a mixture of hydrocarbons boiling in the range from about 90°-450° F. and additionally comprising from about 0.0005-5.0 weight percent of the reaction product obtained by reacting, at a temperature of about 30°-200° C: (a) 0.5-2.5 moles of a dibasic acid anhydride; (b) 0.5-1.5 moles of a polyoxyalkylene diamine of the formula ##STR11## where R 1 and R 2 are C 1 -C 12 alkylene groups, q and r are integers having a value of 0 or 1, c has a value from 2-150, b+d has a value from 2-150, and are has a value from 0-12; and (c) 0.5-1.5 moles of a heterocyclic azole.
Claim 2
Dependent Claim
110 words
A motor fuel composition comprising a mixture of hydrocarbons boiling in the range from about 90°-450° F. and additionally comprising from about 0.0005-5.0 weight percent of the reaction product obtained by reacting, at a temperature of about 30°-200° C: (a) 0.5-2.5 moles of a dibasic acid anhydride; (b) 0.5-1.5 moles of a polyoxyalkylene diamine of the formula ##STR11## where R 1 and R 2 are C 1 -C 12 alkylene groups, q and r are integers having a value of 0 or 1, c has a value from 2-150, b+d has a value from 2-150, and are has a value from 0-12; and (c) 0.5-1.5 moles of a heterocyclic azole.
Claim 3
Dependent Claim
16 words
A motor fuel composition according to claim 1, where said dibasic acid anhydride is maleic anhydride.
Claim 4
Dependent Claim
40 words
A motor fuel composition according to claim 1, where said polyoxyalkylene diamine is of the formula ##STR12## where c has a value from about 2-50, b+d has a vaIue from about 2-50, and a+e has a value from about 2-8.
Claim 5
Dependent Claim
29 words
A composition according to claim 1, where said polyoxyalkylene diamine is of the formula ##STR13## where c has a value of 2-50, and b+d has a value of 2-50.
Claim 6
Dependent Claim
15 words
A motor fuel composition according to claim 1, where said heterocyclic azole is an aminotriazole.
Claim 7
Dependent Claim
22 words
A motor fuel composition according to claim 5, where said aminotriazole is selected from the group consisting of 3-, 4- and 5-aminotriazole.
Claim 8
Dependent Claim
15 words
A motor fuel composition according to claim 1, where said heterocyclic azole is an aminotetrazole.
Claim 9
Dependent Claim
21 words
A motor fuel composition according to claim 7, where said aminotetrazole is selected from the group consisting of 4- and 5-aminotetrazole.
Claim 10
Dependent Claim
15 words
A motor fuel composition according to claim 1, where said heterocyclic azole is an aminomercaptothiadiazole.
Claim 11
Dependent Claim
14 words
A motor fuel composition according to claim 9, where said aminomercaptothiadiazole is a 5-aminomercaptothiadiazole.
Claim 12
Dependent Claim
15 words
A motor fuel composition according to claim 1, where said heterocyclic azole is a benzomercaptothiazole.
Claim 13
Dependent Claim
14 words
A motor fuel composition according to claim 1, where said heterocyclic azole is benzotriazole.
Claim 14
Dependent Claim
14 words
A motor fuel composition according to claim 1, where said heterocyclic azole is tolyltriazole.
Claim 15
Dependent Claim
22 words
A motor fuel composition according to any one of the preceding claims comprising from about 0.001-0.1 weight percent of said reaction product.
References Cited (Backward Citations)
US4282008A
Cited
US4445907A
Cited
US4477261A
Cited
US4536189A
Cited
US4747851A
Cited
US4810261A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-09-11 | 1993-03-13 | 1993-09-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-09-11 | 1997-03-13 | 1997-09-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-09-11 | 2001-03-13 | 2001-09-12 | $7700.00 | Window Closed / Lapsed |