US2590431A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Water aerator and filter
Assignee: —
•
Filing: —
•
Granted: 1952-03-25
•
Expires: 1969-03-25
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 04:07
CPC Classifications
B; B01; B01D; B01D17/00; B01D17/02; B01D17/0208; B01D17/0214; C; C02; C02F; C02F1/00; C02F1/001; C02F1/72; C02F1/74; C02F2209/00; C02F2209/42
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US156357A
Cited
US1765338A
Cited
US2064861A
Cited
US1985435A
Cited
US2048158A
Cited
US2239612A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-03-25 | 1955-09-24 | 1956-03-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-03-25 | 1959-09-24 | 1960-03-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-03-25 | 1963-09-24 | 1964-03-25 | $7700.00 | Window Closed / Lapsed |