Patent US4522631A successfully refreshed from Google Patents.
US4522631A
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US
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Diesel fuel containing rare earth metal and oxygenated compounds
Assignee: Texaco Inc
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Filing: 1983-11-18
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Granted: 1985-06-11
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Expires: 2003-11-18
Abstract
Abstract Addition of an oxygenated compound and a diesel fuel soluble form of a rare earth metal has been found to reduce particulate emissions from a diesel fueled engine. Preferred soluble rare earth metal additives include cerium carbonyls such as cerium salts of alkylcarboxylic acids and cyclic carboxylic acids.
Inventors
- 👤 Antonio M. Mourao
- 👤 Clifford H. Faist
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 12:49
CPC Classifications
C; C10; C10L; C10L10/00; C10L10/02; C10L1/00; C10L1/10; C10L1/14; C10L1/18; C10L1/185; C10L1/1857; C10L1/188; C10L1/1881; F; F02; F02B; F02B3/00; F02B3/06
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
91 words
A diesel fuel comprising a hydrocarbon based diesel fuel composition boiling in the range of about 350° F. (175° C.) to 750° F. (400° C.) and containing a particulate suppressing mixture of between about 0.001 and about 0.1% by weight of a cerium salt of an acid selected from the group consisting of carboxylic acids and cycloalkyl carboxylic acids having from 3 to 25 carbon atoms, and an alkylcarbitol having from about 5 to 16 carbon atoms providing from about 0.0025 to 1.5 wt. % of oxygen in said diesel fuel.
Claim 2
Dependent Claim
91 words
A diesel fuel comprising a hydrocarbon based diesel fuel composition boiling in the range of about 350° F. (175° C.) to 750° F. (400° C.) and containing a particulate suppressing mixture of between about 0.001 and about 0.1% by weight of a cerium salt of an acid selected from the group consisting of carboxylic acids and cycloalkyl carboxylic acids having from 3 to 25 carbon atoms, and an alkylcarbitol having from about 5 to 16 carbon atoms providing from about 0.0025 to 1.5 wt. % of oxygen in said diesel fuel.
Claim 3
Dependent Claim
14 words
The fuel of claim 1, wherein said rare earth metal compound comprises cerium octoate.
Claim 4
Dependent Claim
10 words
The fuel of claim 1, wherein said carbitol comprises n-hexylcarbitol.
Claim 5
Dependent Claim
43 words
The fuel composition of claim 1, wherein said cerium is present in the amount between 0.001 and about 0.05% by weight of said fuel and said alkyl carbitol provides from about 0.0025 to about 1% by weight of oxygen in said diesel fuel.
Claim 6
Dependent Claim
19 words
The fuel of claim 4 wherein said cerium carbonyl comprises cerium octate and said alkyl carbitol comprises n-hexyl carbitol.
Claim 7
Dependent Claim
69 words
A fuel additive concentrate comprising a major amount of a cerium salt of an acid selected from the group consisting of carboxylic acids and cycloalkyl carboxylic acids having from 3 to 25 carbon atoms, an alkyl carbitol having from about 5 to 16 carbon atoms and a minor amount of a diesel fuel composition boiling in the range of about 350° F. (175° C.) to 750° F. (400° C.).
Claim 8
Dependent Claim
69 words
A fuel additive concentrate comprising a major amount of a cerium salt of an acid selected from the group consisting of carboxylic acids and cycloalkyl carboxylic acids having from 3 to 25 carbon atoms, an alkyl carbitol having from about 5 to 16 carbon atoms and a minor amount of a diesel fuel composition boiling in the range of about 350° F. (175° C.) to 750° F. (400° C.).
References Cited (Backward Citations)
US2737932A
Cited
US2221839A
Cited
US2128685A
Cited
US2774656A
Cited
US3976437A
Cited
US4264335A
Cited
US4251233A
Cited
US4207078A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 1988-06-10 | 1988-12-10 | 1989-06-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-06-10 | 1992-12-10 | 1993-06-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-06-10 | 1996-12-10 | 1997-06-11 | $7700.00 | Window Closed / Lapsed |