US3950145A
Expired / Lapsed
US
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Fuel compositions and additive mixtures containing methanetricarboxylates for reducing exhaust gas catalyst plugging
Assignee: Ethyl Corp
•
Filing: 1975-06-05
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Granted: 1976-04-13
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Expires: 1995-06-05
Abstract
Abstract Gasoline compositions and additive mixtures of methanetricarboxylates in amount sufficient to alleviate the plugging of certain catalysts being used in an engine exhaust system to lower the amount of undesirable constituents in exhaust gas from an engine being operated on gasoline containing a cyclopentadienyl manganese antiknock.
Inventors
- 👤 Leonard M. Niebylski
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 10:11
CPC Classifications
C; C10; C10L; C10L10/00; C10L10/10; C10L1/00; C10L1/10; C10L1/14; C10L10/04; C10L10/06; C10L1/18; C10L1/19; C10L1/1905; C10L1/30; C10L1/305
Claims Analysis
Total Claims: 24
Claim 1
Independent Claim
58 words
As a composition of matter, a gasoline for an internal combustion engine comprising i. an antiknock amount of a cyclopentadienyl manganese tricarbonyl antiknock compound and ii. an amount sufficient to reduce the plugging of an exhaust gas catalyst of a compound having the general formula: ##EQU6## wherein R and R' are independently selected from hydrogen and hydrocarbyl radicals.
Claim 2
Dependent Claim
58 words
As a composition of matter, a gasoline for an internal combustion engine comprising i. an antiknock amount of a cyclopentadienyl manganese tricarbonyl antiknock compound and ii. an amount sufficient to reduce the plugging of an exhaust gas catalyst of a compound having the general formula: ##EQU6## wherein R and R' are independently selected from hydrogen and hydrocarbyl radicals.
Claim 3
Dependent Claim
21 words
The composition of claim 1 wherein said cyclopentadienyl group is a hydrocarbon group containing from 5 to about 17 carbon atoms.
Claim 4
Dependent Claim
11 words
The composition of claim 1 wherein said cyclopentadienyl group is methylcyclopentadienyl.
Claim 5
Dependent Claim
21 words
The composition of claim 3 wherein each R is a lower alkyl group having from 1 to about 10 carbon atoms.
Claim 6
Dependent Claim
20 words
The composition of claim 3 wherein R' is a lower alkyl group having from 1 to about 10 carbon atoms.
Claim 7
Dependent Claim
10 words
The composition of claim 3 wherein each R is ethyl.
Claim 8
Dependent Claim
9 words
The composition of claim 6 wherein R' is hydrogen.
Claim 9
Dependent Claim
74 words
A substantially lead-free gasoline for use with a noble metal exhaust gas purification catalyst, said gasoline comprising i. a cyclopentadienyl manganese tricarbonyl antiknock compound in an amount sufficient to improve the antiknock characteristics of said gasoline, and ii. a compound in an amount sufficient to reduce plugging of said noble metal exhaust gas purification catalyst, said compound having the general formula: ##EQU7## wherein R and R' are independently selected from hydrogen and hydrocarbyl radicals.
Claim 10
Dependent Claim
74 words
A substantially lead-free gasoline for use with a noble metal exhaust gas purification catalyst, said gasoline comprising i. a cyclopentadienyl manganese tricarbonyl antiknock compound in an amount sufficient to improve the antiknock characteristics of said gasoline, and ii. a compound in an amount sufficient to reduce plugging of said noble metal exhaust gas purification catalyst, said compound having the general formula: ##EQU7## wherein R and R' are independently selected from hydrogen and hydrocarbyl radicals.
Claim 11
Dependent Claim
21 words
The gasoline of claim 8 wherein said cyclopentadienyl group is a hydrocarbon group containing from 5 to about 17 carbon atoms.
Claim 12
Dependent Claim
11 words
The gasoline of claim 9 wherein said cyclopentadienyl group is methylcyclopentadienyl.
Claim 13
Dependent Claim
21 words
The gasoline of claim 10 wherein each R is a lower alkyl group having from 1 to about 10 carbon atoms.
Claim 14
Dependent Claim
9 words
The gasoline of claim 11 wherein R' is hydrogen.
Claim 15
Dependent Claim
10 words
The gasoline of claim 11 wherein each R is ethyl.
Claim 16
Dependent Claim
9 words
The gasoline of claim 13 wherein R' is hydrogen.
Claim 17
Dependent Claim
54 words
As a composition of matter an additive fluid for low lead or essentially lead-free gasoline comprising a cyclopentadienyl manganese tricarbonyl antiknock compound and an amount sufficient to reduce the plugging of an exhaust gas catalyst of a compound having the formula: ##EQU8## wherein R and R' are independently selected from hydrogen and hydrocarbyl radicals.
Claim 18
Dependent Claim
54 words
As a composition of matter an additive fluid for low lead or essentially lead-free gasoline comprising a cyclopentadienyl manganese tricarbonyl antiknock compound and an amount sufficient to reduce the plugging of an exhaust gas catalyst of a compound having the formula: ##EQU8## wherein R and R' are independently selected from hydrogen and hydrocarbyl radicals.
Claim 19
Dependent Claim
21 words
The composition of claim 15 wherein said cyclopentadienyl group is a hydrocarbon group containing from 5 to about 17 carbon atoms.
Claim 20
Dependent Claim
11 words
The composition of claim 16 wherein said cyclopentadienyl group is methylcyclopentadienyl.
Claim 21
Dependent Claim
21 words
The composition of claim 17 wherein each R is a lower alkyl group having from 1 to about 10 carbon atoms.
Claim 22
Dependent Claim
9 words
The composition of claim 18 wherein R' is hydrogen.
Claim 23
Dependent Claim
10 words
The composition of claim 18 wherein each R is ethyl.
Claim 24
Dependent Claim
9 words
The composition of claim 20 wherein R' is hydrogen.
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) | 1979-04-13 | 1979-10-13 | 1980-04-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-04-13 | 1983-10-13 | 1984-04-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-04-13 | 1987-10-13 | 1988-04-13 | $7700.00 | Window Closed / Lapsed |