US2492333A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for continuously purifying and concentrating acid pickling liquors
Assignee: Individual
•
Filing: 1946-07-01
•
Granted: 1949-12-27
•
Expires: 1966-07-01
Abstract
No abstract record available.
Inventors
- 👤 Swindin Norman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 08:08
CPC Classifications
B; B01; B01D; B01D1/00; B01D1/06; B01D1/10; B01D1/22; B01D1/222; C; C01; C01B; C01B17/00; C01B17/69; C01B17/90; C01B17/901; C01G; C01G49/00; C01G49/14; C23; C23G; C23G1/00; C23G1/36; Y; Y10; Y10S; Y10S159/00; Y10S159/19; Y10S423/00; Y10S423/01; Y10S423/02; Y10T; Y10T137/00; Y10T137/2713; Y10T137/2917
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US640026A
Cited
US1256068A
Cited
US1676277A
Cited
US1799127A
Cited
US1865614A
Cited
US2017773A
Cited
US2322134A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-12-26 | 1953-06-27 | 1953-12-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-12-26 | 1957-06-27 | 1957-12-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-12-26 | 1961-06-27 | 1961-12-27 | $7700.00 | Window Closed / Lapsed |