US2488128A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of silica microsphere supported iron group catalyst
Assignee: Standard Oil Development Co
•
Filing: 1945-12-29
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Granted: 1949-11-15
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Expires: 1965-12-29
Abstract
No abstract record available.
Inventors
- 👤 Jr Charles N Kimberlin
- 👤 Jr Robert E Schexnailder
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 03:34
CPC Classifications
C; C07; C07C; C07C1/00; C07C1/02; C07C1/04; C07C1/0425; C07C1/0445; B; B01; B01J; B01J21/00; B01J21/06; B01J21/08; B01J23/00; B01J23/70; B01J23/76; B01J23/83; B01J35/00; B01J35/50; B01J35/51; C07C2521/00; C07C2521/06; C07C2521/08; C07C2523/00; C07C2523/12; C07C2523/70; C07C2523/74; C07C2523/75; C07C2523/755; C07C2523/76; C07C2523/83
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1775366A
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US2244196A
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GB553736A
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US2360787A
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US2347682A
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US2385217A
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US2429751A
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US2384946A
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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) | 1952-11-14 | 1953-05-16 | 1953-11-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-11-14 | 1957-05-16 | 1957-11-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-11-14 | 1961-05-16 | 1961-11-15 | $7700.00 | Window Closed / Lapsed |