US2177183A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Solvent recovery method
Assignee: Lummus Technology LLC
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Filing: 1935-05-01
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Granted: 1939-10-24
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Expires: 1955-05-01
Abstract
No abstract record available.
Inventors
- 👤 Wheaton W Kraft
- 👤 Merle A Zimmerman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 20:03
CPC Classifications
B; B01; B01D; B01D11/00; B01D11/04; B01D11/0426; B01D11/0488; C; C10; C10G; C10G21/00; C10G21/28
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) | 1942-10-23 | 1943-04-24 | 1943-10-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1946-10-23 | 1947-04-24 | 1947-10-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1950-10-23 | 1951-04-24 | 1951-10-24 | $7700.00 | Window Closed / Lapsed |