US1570523A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Filtration of water or liquid
Assignee: Individual
•
Filing: 1922-04-24
•
Granted: 1926-01-19
•
Expires: 1942-04-24
Abstract
No abstract record available.
Inventors
- 👤 Pennell Reginald Humphrey Lee
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 08:10
CPC Classifications
B; B01; B01D; B01D35/00; B01D35/12; B01D24/00; B01D24/002; B01D24/005; B01D24/02; B01D24/20; B01D24/24; B01D24/38; B01D24/46; B01D24/4631; B01D2201/00; B01D2201/20; B01D2201/204; B01D2201/206
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) | 1929-01-18 | 1929-07-20 | 1930-01-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1933-01-18 | 1933-07-20 | 1934-01-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1937-01-18 | 1937-07-20 | 1938-01-19 | $7700.00 | Window Closed / Lapsed |