Patent US3697447A successfully refreshed from Google Patents.
US3697447A
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US
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Catalytic oxidation unit comprising a fluid permeable body of fibrous admixture
Assignee: Johns Manville Corp
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Filing: 1969-05-07
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Granted: 1972-10-10
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Expires: 1989-05-07
Abstract
Abstract A CATALYST OXIDATION BURNER UNIT FOR THE FLAMELESS COMBUSTION OF GASEOUS CARBONACEOUS FUEL COMPRISING A GAS PERMEABLE, COMPOSITE FIBER POROUS BODY OF AN INTIMATE ADMIXTURE OF ASBESTOS FIBER AND CERAMIC TYPE REFRACTORY FIBER CONTAINING A DEPOSITED METAL CATALYST.
Inventors
- 👤 Edward Robert Bettinardi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 07:40
CPC Classifications
B; B01; B01D; B01D53/00; B01D53/34; B01D53/74; B01D53/86; B01D53/864; B01J; B01J35/00; B01J35/50; B01J35/58; F; F23; F23D; F23D14/00; F23D14/12; F23D14/18
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-10-10 | 1976-04-10 | 1976-10-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-10-10 | 1980-04-10 | 1980-10-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-10-10 | 1984-04-10 | 1984-10-10 | $7700.00 | Window Closed / Lapsed |