US1944548A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of the separation of solid substances from liquid by vacuum cooling in stages
Assignee: American Lurgi Corp
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Filing: 1932-06-30
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Granted: 1934-01-23
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Expires: 1952-06-30
Abstract
No abstract record available.
Inventors
- 👤 Ebner Karl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 21:15
CPC Classifications
B; B01; B01D; B01D19/00; B01D19/0068; B01D3/00; B01D3/10; B01D5/00; B01D5/0033; B01D5/0036; B01D5/0039; B01D5/0048; B01D5/0057; B01D5/0069; B01D5/0078; B01D5/009; B01D9/00; B01D9/0018; B01D9/0022; B01D9/0059
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) | 1937-01-22 | 1937-07-24 | 1938-01-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1941-01-22 | 1941-07-24 | 1942-01-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1945-01-22 | 1945-07-24 | 1946-01-23 | $7700.00 | Window Closed / Lapsed |