Patent US2472502A successfully refreshed from Google Patents.
US2472502A
Expired / Lapsed
US
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Apparatus for stripping finely dividfd solids
Assignee: Standard Oil Development Co
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Filing: 1945-07-28
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Granted: 1949-06-07
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Expires: 1965-07-28
Abstract
No abstract record available.
Inventors
- 👤 Charles W Tyson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 20:00
CPC Classifications
B; B01; B01J; B01J8/00; B01J8/18; B01J8/1881; B01J38/00; B01J38/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2337684A
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US2394814A
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US2367694A
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GB558028A
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US2391944A
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US2389493A
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US2415755A
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US2415756A
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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) | 1952-06-06 | 1952-12-06 | 1953-06-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-06-06 | 1956-12-06 | 1957-06-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-06-06 | 1960-12-06 | 1961-06-07 | $7700.00 | Window Closed / Lapsed |