US5051241A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Microlith catalytic reaction system
Assignee: Individual
•
Filing: 1988-11-18
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Granted: 1991-09-24
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Expires: 2008-11-18
Abstract
Abstract A catalytic reactor for oxidation of carbonaceous fuels comprising at least one microlith catalytic element having flow channels with a flow path length no longer than about two times the diameter of the largest flow channel. The initial catalyst element is advantageously electrically conductive to permit electrical heating.
Inventors
- 👤 William C. Pfefferle
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 07:35
CPC Classifications
B; B01; B01D; B01D53/00; B01D53/34; B01D53/92; B01D53/94; B01D53/9445; B01D53/9454; B01J; B01J12/00; B01J12/007; B01J19/00; B01J19/0093; F; F01; F01N; F01N13/00; F01N13/009; F01N13/0097; F01N3/00; F01N3/08; F01N3/10; F01N3/18; F01N3/20; F01N3/2006; F01N3/2013; F01N3/2026; F01N3/24; F01N3/28; F01N3/2803; F01N3/2807; F01N3/2825; F01N3/2835; B01J2219/00; B01J2219/00781; B01J2219/00783; B01J2219/00819; B01J2219/00822; B01J2219/00824; B01J2219/00835; B01J2219/00873; F01N2330/00; F01N2330/06; F01N2330/10; F01N2330/12; F01N2330/14; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/12
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
54 words
A catalytic reaction system for the chemical conversion of carbon containing compounds comprising a multiplicity of catalytic elements and having at least one microlith catalytic element having flow channels with flow paths less than about one millimeter and having a ratio of channel length to channel diameter of less than about two to one.
Claim 2
Dependent Claim
54 words
A catalytic reaction system for the chemical conversion of carbon containing compounds comprising a multiplicity of catalytic elements and having at least one microlith catalytic element having flow channels with flow paths less than about one millimeter and having a ratio of channel length to channel diameter of less than about two to one.
Claim 3
Dependent Claim
25 words
The system of claim 1 in which the flow path length of said flow channels is no longer than the diameter of said flow channels.
Claim 4
Dependent Claim
17 words
The system of claim 1 in which said flow channel diameters are less than about 0.5 millimeters.
Claim 5
Dependent Claim
45 words
The system of claim 1 in which the number density of said flow channels is greater than 100 channels per square centimeter and the open area of said at least one microlith catalytic element in the direction of flow is greater than about 60 percent.
Claim 6
Dependent Claim
22 words
The system of claim 3 in which the number density of said flow channels is greater than 1000 channels per square centimeter.
Claim 7
Dependent Claim
15 words
The system of claim 1 further comprising at least one electrically conductive microlith catalyst element.
Claim 8
Dependent Claim
44 words
The system of claim 6 wherein the mass of said electrically conductive microlith catalyst element is sufficiently low such that said catalyst element can be electrically heated to a temperature of at least 1000 degrees Kelvin within about one second using an automotive battery.
Claim 9
Dependent Claim
32 words
The system of claim 7 wherein the mass of said electrically conductive catalyst element is sufficiently low such that said catalyst element can be heated to said temperature within about 0.50 seconds.
Claim 10
Dependent Claim
15 words
The reaction system of claim 1 comprising at least three of said microlith catalytic elements.
Claim 11
Dependent Claim
29 words
The reaction system of claim 9 wherein said microlith catalytic elements have at least about 400 flow channels per square centimeter and greater than about sixty percent open area.
Claim 12
Dependent Claim
15 words
The system of claim 10 wherein said flow channels are no longer than 0.1 millimeters.
References Cited (Backward Citations)
US4350664A
Cited
US4556543A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1994-09-23 | 1995-03-25 | 1995-09-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-09-23 | 1999-03-25 | 1999-09-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-09-23 | 2003-03-25 | 2003-09-24 | $7700.00 | Window Closed / Lapsed |