US2281616A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process and apparatus for treating liquids with a gaseous medium
Assignee: Individual
•
Filing: 1937-03-01
•
Granted: 1942-05-05
•
Expires: 1957-03-01
Abstract
No abstract record available.
Inventors
- 👤 Placek Adolph
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 00:37
CPC Classifications
B; B01; B01F; B01F23/00; B01F23/20; B01F23/23; B01F23/233; B01F27/00; B01F27/27; B01F27/271; B01F27/2711; B01F27/2713; B01F27/272; B01F27/2721; B01F27/2723; B01F25/00; B01F2025/91; B01F2025/912; Y; Y10; Y10S; Y10S494/00; Y10S494/90
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) | 1945-05-04 | 1945-11-03 | 1946-05-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1949-05-04 | 1949-11-03 | 1950-05-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1953-05-04 | 1953-11-03 | 1954-05-05 | $7700.00 | Window Closed / Lapsed |