US2022164A
Expired / Lapsed
US
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Water filtering and cooling means
Assignee: Individual
•
Filing: 1932-11-07
•
Granted: 1935-11-26
•
Expires: 1952-11-07
Abstract
No abstract record available.
Inventors
- 👤 Ernest J Sweetland
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 18:22
CPC Classifications
B; B01; B01D; B01D35/00; B01D35/18; B01D29/00; B01D29/11; B01D29/31; B01D29/33; B01D29/50; B01D29/52; B67; B67D; B67D1/00; B67D1/0003; B67D1/0009; B67D1/0014; B67D1/08; B67D1/0857; B67D1/0858; B01D2201/00; B01D2201/18; B01D2201/182; B01D37/00; B67D2210/00; B67D2210/00002; B67D2210/00005; B67D2210/0001
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) | 1938-11-25 | 1939-05-27 | 1939-11-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1942-11-25 | 1943-05-27 | 1943-11-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1946-11-25 | 1947-05-27 | 1947-11-26 | $7700.00 | Window Closed / Lapsed |