Patent US2283008A successfully refreshed from Google Patents.
US2283008A
Expired / Lapsed
US
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Chemical processing apparatus
Assignee: Pennsylvania Salt Manufacturing Co
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Filing: 1940-08-01
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Granted: 1942-05-12
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Expires: 1960-08-01
Abstract
No abstract record available.
Inventors
- 👤 Bar William D Le
- 👤 Russell E Cushing
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 10:07
CPC Classifications
C; C01; C01B; C01B33/00; C01B33/20; C01B33/32; B; B01; B01F; B01F27/00; B01F27/05; B01F27/07; B01F27/071; B01F27/21; B01F27/60; B01F27/70; B01F27/701; B01F27/702; B01F27/707
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) | 1945-05-11 | 1945-11-10 | 1946-05-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1949-05-11 | 1949-11-10 | 1950-05-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1953-05-11 | 1953-11-10 | 1954-05-12 | $7700.00 | Window Closed / Lapsed |