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US2470410A
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Preparation of silica magnesia catalysts
Assignee: Standard Oil Development Co
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Filing: 1946-04-09
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Granted: 1949-05-17
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Expires: 1966-04-09
Abstract
No abstract record available.
Inventors
- 👤 Karl J Nelson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 02:28
CPC Classifications
B; B01; B01J; B01J21/00; B01J21/14
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1772055A
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US1900859A
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US2326523A
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US2343731A
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US2343634A
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US2363832A
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US2343295A
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US2390556A
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US2340698A
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US2412958A
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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) | 1952-05-16 | 1952-11-15 | 1953-05-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-05-16 | 1956-11-15 | 1957-05-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-05-16 | 1960-11-15 | 1961-05-17 | $7700.00 | Window Closed / Lapsed |