Patent US4097684A successfully refreshed from Google Patents.
Patent US4417904A successfully refreshed from Google Patents.
US4417904A
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US
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N,N'-Dialkyl-N,N'-diphenyl alkylene diamine derivatives as antiknock agents
Assignee: Phillips Petroleum Co
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Filing: 1981-12-16
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Granted: 1983-11-29
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Expires: 2001-12-16
Abstract
Abstract The antiknock properties of fuel compositions are improved by adding thereto one or more compounds of the general formula <IMAGE> wherein R is a hydrocarbon group, R1, and R2 are hydrogen or hydrocarbon groups and RI and RII are substituted or unsubstituted arylene groups.
Inventors
- 👤 Lyle D. Burns
- 👤 Robert M. Parlman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 08:45
CPC Classifications
C; C10; C10L; C10L10/00; C10L10/10; C10L1/00; C10L1/10; C10L1/14; C10L1/22; C10L1/222; C10L1/223
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
62 words
A fuel composition having antiknock characteristics containing at least one compound of the formula: ##STR3## wherein R is hydrocarbyl; R 1 and R 2 are independently selected from alkyl groups having from 1 to about 7 carbon atoms; and R 3 , R 4 , R 5 , R 6 , R 7 and R 8 are independently hydrogen or hydrocarbon groups.
Claim 2
Dependent Claim
62 words
A fuel composition having antiknock characteristics containing at least one compound of the formula: ##STR3## wherein R is hydrocarbyl; R 1 and R 2 are independently selected from alkyl groups having from 1 to about 7 carbon atoms; and R 3 , R 4 , R 5 , R 6 , R 7 and R 8 are independently hydrogen or hydrocarbon groups.
Claim 3
Dependent Claim
44 words
The fuel composition of either of claims 1 or 2 wherein R 3 , R 4 , R 5 , R 6 , R 7 and R 8 are independently selected from the group consisting of hydrogen, C 1-7 alkyl groups, and aryl groups.
Claim 4
Dependent Claim
22 words
The fuel composition of either of claims 1 or 2 wherein one or two methyl groups are para to the nitrogen atoms.
Claim 5
Dependent Claim
22 words
The fuel composition of either of claim 1 wherein R is methylene, and R 1 and R 2 are both methyl groups.
Claim 6
Independent Claim
72 words
A method of improving the antiknock performance of a fuel composition comprising adding to the composition at least one compound of the formula: ##STR4## wherein R is hydrocarbyl; R 1 and R 2 are independently selected from alkyl groups having from 1 to about 7 carbon atoms and R 3 , R 4 , R 5 , R 6 , R 7 , and R 8 are independently hydrogen or hydrocarbon groups.
Claim 7
Independent Claim
72 words
A method of improving the antiknock performance of a fuel composition comprising adding to the composition at least one compound of the formula: ##STR4## wherein R is hydrocarbyl; R 1 and R 2 are independently selected from alkyl groups having from 1 to about 7 carbon atoms and R 3 , R 4 , R 5 , R 6 , R 7 , and R 8 are independently hydrogen or hydrocarbon groups.
Claim 8
Dependent Claim
29 words
The method of claim 5 wherein R 1 and R 2 are independently selected from the group consisting of alkyl groups having from 1 to about 7 carbon atoms.
Claim 9
Independent Claim
43 words
The method of either of claims 6 or 7 wherein R 3 , R 4 , R 5 , R 6 , R 7 and R 8 are independently selected from the group consisting of hydrogen, C 1-7 alkyl groups, and aryl groups.
Claim 10
Independent Claim
21 words
The method of either of claims 6 or 7 wherein one or two methyl groups are para to the nitrogen atoms.
Claim 11
Independent Claim
24 words
The method of any one of claims 6 or 7 wherein R is methylene, and R 1 and R 2 are both methyl groups.
Claim 12
Dependent Claim
19 words
The method of claim 8 wherein R is methylene and R 1 and R 2 are both methyl groups.
Claim 13
Dependent Claim
20 words
The fuel composition of claim 3 wherein R is methylene and R 1 and R 2 are both methyl groups.
References Cited (Backward Citations)
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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) | 1986-11-28 | 1987-05-30 | 1987-11-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-11-28 | 1991-05-30 | 1991-11-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-11-28 | 1995-05-30 | 1995-11-29 | $7700.00 | Window Closed / Lapsed |