US4509952A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Chemical composition
Assignee: Ethyl Corp
•
Filing: 1981-04-01
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Granted: 1985-04-09
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Expires: 2001-04-01
Abstract
Abstract A minor amount of alkyldimethylamine may be added to a distillate fuel oil to stabilize the fuel oil against deterioration.
Inventors
- 👤 Henry G. Braxton, Jr.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 19:18
CPC Classifications
C; C10; C10L; C10L1/00; C10L1/10; C10L1/14; C10L1/22; C10L1/222; C10L1/2222; F; F02; F02B; F02B3/00; F02B3/06
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
56 words
A fuel oil composition consisting essentially of a petroleum distillate fuel oil selected from the group consisting of furnace oil and diesel fuel and a minor amount of alkyldimethylamine, having the structure: ##STR2## wherein R is a straight chain C 4 -C 20 alkyl or a mixture thereof, sufficient to stabilize said fuel oil against deterioration.
Claim 2
Dependent Claim
56 words
A fuel oil composition consisting essentially of a petroleum distillate fuel oil selected from the group consisting of furnace oil and diesel fuel and a minor amount of alkyldimethylamine, having the structure: ##STR2## wherein R is a straight chain C 4 -C 20 alkyl or a mixture thereof, sufficient to stabilize said fuel oil against deterioration.
Claim 3
Dependent Claim
21 words
A fuel oil composition of claim 1 wherein R is a straight chain C 8 -C 14 alkyl or mixture thereof.
Claim 4
Dependent Claim
16 words
A fuel oil composition of claim 2 wherein R is a straight chain C 8 alkyl.
References Cited (Backward Citations)
US2758086A
Cited
US3707362A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-04-08 | 1988-10-08 | 1989-04-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-04-08 | 1992-10-08 | 1993-04-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-04-08 | 1996-10-08 | 1997-04-09 | $7700.00 | Window Closed / Lapsed |