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US2487867A
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Catalyst purification
Assignee: Standard Oil Development Co
•
Filing: 1945-07-11
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Granted: 1949-11-15
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Expires: 1965-07-11
Abstract
No abstract record available.
Inventors
- 👤 Jr Lindsay I Griffin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 17:33
CPC Classifications
B; B01; B01J; B01J23/00; B01J23/90; B01J23/94; C; C07; C07C; C07C1/00; C07C1/02; C07C1/04; C07C1/0425; C07C1/045; C07C29/00; C07C29/15; C07C29/151; C07C29/153; C07C29/156; C07C2523/00; C07C2523/70; C07C2523/74; C07C2523/745; C07C2523/75; Y; Y02; Y02P; Y02P20/00; Y02P20/50; Y02P20/584
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1954096A
Cited
US1933508A
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US2159140A
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US2238726A
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US2247087A
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US2259961A
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US2367474A
Cited
US2414276A
Cited
US2414852A
Cited
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 |