US2472831A
Expired / Lapsed
US
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Process for the preparation of a silica-metal oxide hydrogel catalyst
Assignee: Standard Oil Development Co
•
Filing: 1947-02-28
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Granted: 1949-06-14
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Expires: 1967-02-28
Abstract
No abstract record available.
Inventors
- 👤 Edward A Hunter
- 👤 Jr Charles N Kimberlin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 00:29
CPC Classifications
C; C01; C01G; C01G37/00; C01G37/02; B; B01; B01J; B01J37/00; B01J37/0009; B01J37/0018; C01B; C01B13/00; C01B13/14; C01B13/36; C01B13/363; C01B33/00; C01B33/20; C01F; C01F3/00; C01G45/00; C01G45/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-06-13 | 1952-12-13 | 1953-06-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-06-13 | 1956-12-13 | 1957-06-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-06-13 | 1960-12-13 | 1961-06-14 | $7700.00 | Window Closed / Lapsed |