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US2648291A
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Water purification unit
Assignee: Individual
•
Filing: 1949-10-01
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Granted: 1953-08-11
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Expires: 1969-10-01
Abstract
No abstract record available.
Inventors
- 👤 Clifford B Moller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 20:51
CPC Classifications
F; F04; F04B; F04B53/00; F04B53/06; C; C02; C02F; C02F1/00; C02F1/68; C02F1/685; C02F1/686; F04B43/00; F04B43/02; F04B53/10
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-08-10 | 1957-02-09 | 1957-08-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-08-10 | 1961-02-09 | 1961-08-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-08-10 | 1965-02-09 | 1965-08-11 | $7700.00 | Window Closed / Lapsed |