US2422372A
Expired / Lapsed
US
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Preparation of an alumina supported molybdenum oxide catalyst
Assignee: Shell Development Co
•
Filing: 1942-07-27
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Granted: 1947-06-17
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Expires: 1962-07-27
Abstract
No abstract record available.
Inventors
- 👤 Albert E Smith
- 👤 Otto A Beeck
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 01:06
CPC Classifications
C; C10; C10G; C10G11/00; C10G11/02; C10G11/04; B; B01; B01J; B01J23/00; B01J23/16; B01J23/24; B01J23/28; C10G45/00; C10G45/02; C10G45/04; B01J23/90; B01J23/92; B01J35/00; B01J35/60; B01J35/61; B01J35/613
Claims Analysis
Total Claims: 0
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-06-16 | 1950-12-16 | 1951-06-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-06-16 | 1954-12-16 | 1955-06-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-06-16 | 1958-12-16 | 1959-06-17 | $7700.00 | Window Closed / Lapsed |