US2808154A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Water purification device
Assignee: —
•
Filing: —
•
Granted: 1957-10-01
•
Expires: 1974-10-01
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 22:50
CPC Classifications
C; C02; C02F; C02F1/00; C02F1/28; C02F1/283; C02F1/001; C02F1/003; C02F2307/00; C02F2307/02
Claims Analysis
Total Claims: 0
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US2167225A
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US2335458A
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US2452970A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-09-30 | 1961-04-01 | 1961-10-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-09-30 | 1965-04-01 | 1965-10-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-09-30 | 1969-04-01 | 1969-10-01 | $7700.00 | Window Closed / Lapsed |