US3873277A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Deposit control additives based on hydrazine
Assignee: Chevron USA Inc
•
Filing: 1973-03-15
•
Granted: 1975-03-25
•
Expires: 1993-03-15
Abstract
Abstract Liquid hydrocarbon distillate fuel compositions are provided comprising a hydrocarbonaceous distillate fuel boiling in a gasoline range containing an aliphatic hydrocarbon substituted hydrazine. The aliphatic hydrocarbon radical is relatively free of aliphatic unsaturation and is of from about 400-5,000 molecular weight. The hydrazines useful in preparing the compounds of this invention may be mono- or di-substituted on one of the nitrogens, while the second nitrogen must have at least one hydrogen atom present prior to reaction with the aliphatic hydrocarbon.
Inventors
- 👤 Marvin D Coon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 15:32
CPC Classifications
C; C10; C10L; C10L1/00; C10L1/10; C10L1/14; C10L1/22; C10L1/226
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
31 words
A FUEL COMPOSITION HAVING A MAJOR AMOUNT OF A HYDROCARBONACEOUS DISTILLATE FUEL BOILING IN THE GASOLINE RANGE AND IN AN AMOUNT TO PROVIDE DETERGENCY AND DISPERSANCY, A COMPOSITION OF THE FORMULA:
Claim 2
Dependent Claim
31 words
A FUEL COMPOSITION HAVING A MAJOR AMOUNT OF A HYDROCARBONACEOUS DISTILLATE FUEL BOILING IN THE GASOLINE RANGE AND IN AN AMOUNT TO PROVIDE DETERGENCY AND DISPERSANCY, A COMPOSITION OF THE FORMULA:
Claim 3
Dependent Claim
16 words
The composition of claim 1 wherein X is hydrogen, Y is hydrogen and Z is phenyl.
Claim 4
Dependent Claim
15 words
The composition of claim 2 wherein R is polyisobutylene of about 1,400 average molecular weight.
Claim 5
Dependent Claim
16 words
The composition of claim 1 wherein X is hydrogen, Y is hydrogen and Z is -CH2CH2OH.
Claim 6
Dependent Claim
15 words
The composition of claim 4 wherein R is polyisobutylene of about 1,400 average molecular weight.
Claim 7
Dependent Claim
16 words
The composition of claim 1 wherein X is hydrogen, Y is methyl and Z is methyl.
Claim 8
Dependent Claim
15 words
The composition of claim 6 wherein R is polyisobutylene of about 1,400 average molecular weight.
Claim 9
Dependent Claim
16 words
The composition of claim 1 wherein X is hydrogen, Y is hydrogen and Z is hydrogen.
Claim 10
Dependent Claim
15 words
The composition of claim 8 wherein R is polyisobutylene of about 1,400 average molecular weight.
Claim 11
Dependent Claim
18 words
The composition of claim 1 having from 0.05 to 0.5 percent by volume of a mineral lubricating oil.
References Cited (Backward Citations)
US2971828A
Cited
US2975136A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-03-24 | 1978-09-23 | 1979-03-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-03-24 | 1982-09-23 | 1983-03-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-03-24 | 1986-09-23 | 1987-03-25 | $7700.00 | Window Closed / Lapsed |