US4457763A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Diesel fuel cetane improver
Assignee: Ethyl Corp
•
Filing: 1983-11-07
•
Granted: 1984-07-03
•
Expires: 2003-11-07
Abstract
Abstract Cetane rating of diesel fuel is increased by adding a dioxane nitrate such as m-dioxan-5-ol nitrate and 1,3-dioxolane-4-methanol nitrate.
Inventors
- 👤 Paul D. Seemuth
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 10:11
CPC Classifications
C; C10; C10L; C10L1/00; C10L1/10; C10L1/14; C10L1/22; C10L1/23; C10L1/231; F; F02; F02B; F02B1/00; F02B1/02; F02B1/04; F02B3/00; F02B3/06
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
46 words
Diesel fuel containing a cetane increasing amount of a dioxane nitrate having the structure ##STR2## wherein R 1 , R 2 , R 3 , R 4 and R 5 are independently selected from the group consisting of hydrogen and C 1-12 alkyls, and mixtures thereof.
Claim 2
Dependent Claim
46 words
Diesel fuel containing a cetane increasing amount of a dioxane nitrate having the structure ##STR2## wherein R 1 , R 2 , R 3 , R 4 and R 5 are independently selected from the group consisting of hydrogen and C 1-12 alkyls, and mixtures thereof.
Claim 3
Dependent Claim
19 words
A composition of claim 1 wherein said diesel fuel is a petroleum distillate fuel of the diesel boiling range.
Claim 4
Dependent Claim
12 words
A composition of claim 2 wherein said dioxane nitrate is m-dioxan-5-ol nitrate.
Claim 5
Dependent Claim
12 words
A composition of claim 2 wherein said dioxane nitrate is 1,3-dioxolane-4-methanol nitrate.
Claim 6
Dependent Claim
18 words
A composition of claim 2 wherein said dioxane nitrate is a mixture of m-dioxan-5-ol nitrate and 1,3-dioxolane-4-methanol nitrate.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-07-03 | 1988-01-02 | 1988-07-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-07-03 | 1992-01-02 | 1992-07-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-07-03 | 1996-01-02 | 1996-07-03 | $7700.00 | Window Closed / Lapsed |