Patent US3403111A successfully refreshed from Google Patents.
US3403111A
Expired / Lapsed
US
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Preparation of an alumina catalyst support
Assignee: Wyeth Holdings LLC
•
Filing: 1965-10-08
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Granted: 1968-09-24
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Expires: 1985-10-08
Abstract
No abstract record available.
Inventors
- 👤 Colgan Joseph Dennis
- 👤 Ostroff Norman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 22:37
CPC Classifications
B; B01; B01J; B01J23/00; B01J23/16; B01J23/24; B01J23/28
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2980632A
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US3086845A
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US2809170A
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US3032514A
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US2973330A
Cited
US3020243A
Cited
US3104228A
Cited
US3020245A
Cited
US3025248A
Cited
US3213040A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-09-24 | 1972-03-25 | 1972-09-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-09-24 | 1976-03-25 | 1976-09-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-09-24 | 1980-03-25 | 1980-09-24 | $7700.00 | Window Closed / Lapsed |