US3409696A
Expired / Lapsed
US
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Dehydrogenation catalysts comprising bismuth compounds on macroporous supports
Assignee: Polysar Ltd
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Filing: 1965-05-13
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Granted: 1968-11-05
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Expires: 1985-05-13
Abstract
No abstract record available.
Inventors
- 👤 Minnis Harvey
- 👤 Brian H Oliver
- 👤 Rolston John Henry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 03:59
CPC Classifications
C; C07; C07C; C07C5/00; C07C5/42; C07C5/48; B; B01; B01J; B01J23/00; B01J23/16; B01J27/00; B01J27/14; B01J27/16; B01J27/18; B01J27/185; B01J27/1853; B01J35/00; B01J35/60; B01J35/66; C07C5/32; C07C5/321; C07C5/322; C07C5/327; C07C5/333; C07C5/3332
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2684951A
Cited
US2991321A
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US2991322A
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US3157688A
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US3320330A
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US3260753A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-11-05 | 1972-05-06 | 1972-11-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-11-05 | 1976-05-06 | 1976-11-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-11-05 | 1980-05-06 | 1980-11-05 | $7700.00 | Window Closed / Lapsed |