US6461497B1
Expired / Lapsed
US
⏱️ 0.0 years remaining
Reformulated reduced pollution diesel fuel
Assignee: Atlantic Richfield Co
•
Filing: 1998-09-01
•
Granted: 2002-10-08
•
Expires: 2018-09-01
Abstract
Abstract A reformulated diesel fuel meeting the requirements of ASTM D975-96 a for a low-sulfur number 2 diesel fuel and providing reduced emission benefits relative to a certified diesel fuel, certified under Section 2282(g) Title 13, California Code of Regulations and containing less than 15 volume percent aromatics having a natural cetane number of at least 55, a sulfur content less than 15 ppmw, a nitrogen content less than 10 ppmw, a polycyclic aromatics content no greater than 1.5 weight percent and an initial boiling point of at least 350° F. and a method for producing and using the reformulated diesel fuel.
Inventors
- 👤 Michael J. Pedersen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 01:13
CPC Classifications
C; C10; C10L; C10L1/00; C10L1/04; C10L1/08; C10G; C10G65/00; C10G65/02; C10G65/12
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
97 words
A reformulated diesel fuel meeting the requirements of ASTM D975-96a for a low sulfur no. 2-D diesel fuel and providing reduced emission benefits relative to a certified diesel fuel certified under Section 2282(g) Title 13, California Code of Regulations, said fuel containing less than 11 volume percent aromatics and having: a) a natural cetane number of greater than 55; b) a sulfur content less than 15 ppmw; c) a nitrogen content less than 10 ppmw; d) a polycyclic aromatics content no greater than 1.0 weight percent; and e) an initial boiling point of at least 350° F.
Claim 2
Dependent Claim
97 words
A reformulated diesel fuel meeting the requirements of ASTM D975-96a for a low sulfur no. 2-D diesel fuel and providing reduced emission benefits relative to a certified diesel fuel certified under Section 2282(g) Title 13, California Code of Regulations, said fuel containing less than 11 volume percent aromatics and having: a) a natural cetane number of greater than 55; b) a sulfur content less than 15 ppmw; c) a nitrogen content less than 10 ppmw; d) a polycyclic aromatics content no greater than 1.0 weight percent; and e) an initial boiling point of at least 350° F.
Claim 3
Dependent Claim
17 words
The fuel of claim 1 wherein the fuel has a sulfur content less than about 10 ppmw.
Claim 4
Dependent Claim
17 words
The fuel of claim 2 wherein the fuel has a sulfur content less than about 5 ppmw.
Claim 5
Dependent Claim
21 words
The fuel of claim 1 wherein the fuel has a polycyclic aromatic content from about 0.1 to about 1.45 weight percent.
Claim 6
Dependent Claim
16 words
The fuel of claim 1 wherein the fuel has a cetane number of at least 57.
Claim 7
Dependent Claim
20 words
The fuel of claim 1 wherein the fuel has an initial boiling point from about 375 to about 390° F.
Claim 8
Dependent Claim
20 words
The fuel of claim 1 wherein the fuel has a 90 volume percent boiling point of at least 590° F.
Claim 9
Dependent Claim
22 words
The fuel of claim 1 wherein the fuel has a 90 volume percent boiling point from about 590 to about 640° F.
Claim 10
Dependent Claim
17 words
The fuel of claim 1 wherein the fuel has an aromatics content less than 5 volume percent.
Claim 11
Dependent Claim
20 words
The fuel of claim 1 wherein the fuel has a 10 volume percent boiling point of at least 430° F.
Claim 12
Dependent Claim
22 words
The fuel of claim 1 wherein the fuel has a 10 volume percent boiling point from about 430 to about 450° F.
Claim 13
Dependent Claim
14 words
The fuel of claim 1 wherein the cetane number is greater than about 58.
Claim 14
Dependent Claim
16 words
The fuel of claim 1 wherein the fuel has a cetane number of at least 56.
Claim 15
Dependent Claim
22 words
The fuel of claim 1 wherein the fuel has a 90 volume percent boiling point from about 590 to about 640° F.
Claim 16
Dependent Claim
19 words
The fuel of claim 1 wherein the fuel has an aromatics content from less than about 5 volume percent.
Claim 17
Dependent Claim
17 words
The fuel of claim 1 wherein the fuel has an aromatics content less than 9 volume percent.
Claim 18
Dependent Claim
17 words
The fuel of claim 1 wherein the fuel has an aromatics content less than 8 volume percent.
Claim 19
Dependent Claim
17 words
The fuel of claim 1 wherein the fuel has an aromatics content less than 7 volume percent.
Claim 20
Dependent Claim
17 words
The fuel of claim 1 wherein the fuel has an aromatics content less than 6 volume percent.
Claim 21
Dependent Claim
41 words
The fuel of claim 1 wherein the fuel has an aromatics content from about 9 to less than 11 volume percent, a sulfur content less than about 10 ppmw, and a polycylic aromatic content from about 0.1 to 1.0 weight percent.
Claim 22
Dependent Claim
22 words
The fuel of claim 1 wherein the fuel has an aromatics content from about 10 to less than 11 volume percent aromatics.
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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) | 2005-10-07 | 2006-04-08 | 2006-10-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2009-10-07 | 2010-04-08 | 2010-10-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2013-10-07 | 2014-04-08 | 2014-10-08 | $7700.00 | Window Closed / Lapsed |