Patent US2587554A successfully refreshed from Google Patents.
US2587554A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for stripping finely divided solids
Assignee: Standard Oil Development Co
•
Filing: 1945-10-23
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Granted: 1952-02-26
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Expires: 1965-10-23
Abstract
No abstract record available.
Inventors
- 👤 Weikart John
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 21:13
CPC Classifications
B; B01; B01J; B01J38/00; B01J38/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1984380A
Cited
US2367281A
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US2394814A
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US2367694A
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US2409707A
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US2391944A
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US2394710A
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US2429721A
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US2422793A
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US2414002A
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US2414852A
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US2490993A
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US2408943A
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US2409353A
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US2391336A
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US2425807A
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US2451619A
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US2419323A
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US2461343A
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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) | 1955-02-25 | 1955-08-27 | 1956-02-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-02-25 | 1959-08-27 | 1960-02-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-02-25 | 1963-08-27 | 1964-02-26 | $7700.00 | Window Closed / Lapsed |