US4177168A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Catalyst bed for use in a catalytic flameless heater device
Assignee: Imperial Chemical Industries Ltd
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Filing: 1974-10-31
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Granted: 1979-12-04
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Expires: 1994-10-31
Abstract
Abstract A catalyst bed comprising synthetic inorganic polycrystalline fibres, especially alumina or zirconia, having a BET surface area of 5 to 200 m2/g and a bulk density of 0.01 to 0.2 g/cc used to support 0.01% to 0.5% by weight of a Group 8 metal, e.g., platinum; used for the catalytic oxidation of a vaporous fuel such as butane in devices such as flameless heaters for use in caravans, hatcheries, greenhouses, etc.
Inventors
- 👤 Patrick J. Denny
- 👤 David L. Harrison
- 👤 Martyn H. Stacey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 04:05
CPC Classifications
B; B01; B01J; B01J23/00; B01J23/38; B01J23/40; B01J23/42; B01J35/00; B01J35/50; B01J35/58; F; F23; F23C; F23C2700/00; F23C2700/04; F23C2700/043; Y; Y02; Y02E; Y02E20/00; Y02E20/34
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
117 words
A catalyst bed for use in a catalytic flameless heater device for the oxidation of a vaporous fuel consisting essentially of synthetic inorganic polycrystalline metal oxide fibers and a combustion catalyst supported by the fibers, said catalyst comprising a metal selected from the group consisting of platinum, palladium and rhodium and present at a concentration of 0.01% to 0.5% by weight of the fibers, said catalyst is combined with a metal oxide selected from the group consisting of the oxides of chromium, cobalt, copper, manganese and iron, said fibers having a BET surface area of 5 to 200 square meters per gram and a bulk density in the bed of 0.01 to 0.2 grams per cubic centimeter.
Claim 2
Dependent Claim
117 words
A catalyst bed for use in a catalytic flameless heater device for the oxidation of a vaporous fuel consisting essentially of synthetic inorganic polycrystalline metal oxide fibers and a combustion catalyst supported by the fibers, said catalyst comprising a metal selected from the group consisting of platinum, palladium and rhodium and present at a concentration of 0.01% to 0.5% by weight of the fibers, said catalyst is combined with a metal oxide selected from the group consisting of the oxides of chromium, cobalt, copper, manganese and iron, said fibers having a BET surface area of 5 to 200 square meters per gram and a bulk density in the bed of 0.01 to 0.2 grams per cubic centimeter.
References Cited (Backward Citations)
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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) | 1982-12-03 | 1983-06-04 | 1983-12-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-12-03 | 1987-06-04 | 1987-12-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-12-03 | 1991-06-04 | 1991-12-04 | $7700.00 | Window Closed / Lapsed |