US3799796A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of structures with a coating of al2o3/sio2 fibers bonded to al2o3 for use as catalyst substrates
Assignee: Johnson Matthey Inc
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Filing: 1970-10-06
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Granted: 1974-03-26
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Expires: 1990-10-06
Abstract
Abstract A REFRACTORY COMPOSITION SUITABLE AS A CATALYST SUPPORT COMPRISING A POROUS COATING OF AL2O3/SIO2 FIBERS SURROUNDING AND INTEGRALLY BONDED TO AN INNER PORTION COMPRISING AL2O3.
Inventors
- 👤 J Hunter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 18:34
CPC Classifications
B; B01; B01D; B01D53/00; B01D53/34; B01D53/74; B01D53/86; C; C04; C04B; C04B35/00; C04B35/01; C04B35/10; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24149; Y10T428/24165
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) | 1977-03-25 | 1977-09-24 | 1978-03-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-03-25 | 1981-09-24 | 1982-03-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-03-25 | 1985-09-24 | 1986-03-26 | $7700.00 | Window Closed / Lapsed |