Patent US2337137A successfully refreshed from Google Patents.
US2337137A
Expired / Lapsed
US
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Apparatus for the treatment of solid materials with liquids
Assignee: Celanese Corp
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Filing: 1941-04-24
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Granted: 1943-12-21
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Expires: 1961-04-24
Abstract
No abstract record available.
Inventors
- 👤 Robert F Thompson
- 👤 Royal A Stone
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 18:29
CPC Classifications
B; B08; B08B; B08B3/00; B08B3/04; B08B3/041; B08B3/042; B01; B01D; B01D11/00; B01D11/02; B01D11/0269; B01D11/0273; B01D11/0276; C; C08; C08B; C08B17/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1946-12-20 | 1947-06-21 | 1947-12-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1950-12-20 | 1951-06-21 | 1951-12-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1954-12-20 | 1955-06-21 | 1955-12-21 | $7700.00 | Window Closed / Lapsed |