US3769241A
Expired / Lapsed
US
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Oxidation catalysts
Assignee: BP Chemicals Ltd
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Filing: 1971-03-17
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Granted: 1973-10-30
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Expires: 1991-03-17
Abstract
Abstract GRANULAR OR PELLETED CATALYSTS SUITABLE FOR USE IN THE VAPOUR PHASE OXIDATION OF ORGANIC COMPOUNDS CONTAINING ANTIMONY AND TIN AS OXIDE COMPOSITIONS WHICH HAVE BEEN PRETREATED IN POWDER FORM BY HEATING IN AN INERT ATMOSPHERE TO 200 TO 500*C. AND THEREAFTER PELLETED AND REHEATED IN MOLECULAR OXYGEN TO 550 TO 1000*C.
Inventors
- 👤 R Jenkins
- 👤 D Stewart
- 👤 W Ball
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 16:27
CPC Classifications
B; B01; B01J; B01J23/00; B01J23/16; B01J23/18; B01J23/70; B01J23/76; B01J23/84; B01J23/843; B01J23/8435; B01J37/00; B01J37/0009; B01J37/08; C; C07; C07C; C07C45/00; C07C45/27; C07C45/32; C07C45/33; C07C45/34; C07C45/35; C07C51/00; C07C51/16; C07C51/21; C07C51/25; C07C51/252
Claims Analysis
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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) | 1976-10-29 | 1977-04-30 | 1977-10-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-29 | 1981-04-30 | 1981-10-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-29 | 1985-04-30 | 1985-10-30 | $7700.00 | Window Closed / Lapsed |