US2432286A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of a coprecipitated alumina-molybdena catalyst
Assignee: California Research LLC
•
Filing: 1944-07-19
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Granted: 1947-12-09
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Expires: 1964-07-19
Abstract
No abstract record available.
Inventors
- 👤 William H Claussen
- 👤 Homer B Wellman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 15:26
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)
US2088281A
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US2112931A
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US2184235A
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US2369432A
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US2322863A
Cited
US2371087A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-12-08 | 1951-06-09 | 1951-12-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-12-08 | 1955-06-09 | 1955-12-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-12-08 | 1959-06-09 | 1959-12-09 | $7700.00 | Window Closed / Lapsed |