US3565829A
Expired / Lapsed
US
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Supported catalysts containing vanadium pentoxide and titanium dioxide
Assignee: BASF SE
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Filing: 1968-10-02
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Granted: 1971-02-23
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Expires: 1988-10-02
Abstract
Abstract SUPPORTED CATALYSTS CONTAINING VANADIUM PENTOXIDE AND TITANIUM DIOXIDE FOR OXIDATION REACTION, FOR EXAMPLE FOR THE PRODUCTION OF PHTHALIC ANHYDRIDE FROM O-XYLENE, WHICH CONTAIN ADDITIONS OF ALUMINUM OXIDE AND/OR LITHIUM OXIDE AND/OR ZIRCONIUM DIOXIDE.
Inventors
- 👤 Wilhelm Friedrichsen
- 👤 Otto Goehre
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:51
CPC Classifications
B; B01; B01J; B01J21/00; B01J21/06; B01J21/066; B01J21/063; B01J23/00; B01J23/16; B01J23/20; B01J23/22; C; C07; C07C; C07C51/00; C07C51/16; C07C51/21; C07C51/255; C07C51/265
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) | 1974-02-22 | 1974-08-24 | 1975-02-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-22 | 1978-08-24 | 1979-02-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-22 | 1982-08-24 | 1983-02-23 | $7700.00 | Window Closed / Lapsed |