US2647871A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Water conditioner
Assignee: Individual
•
Filing: 1949-06-01
•
Granted: 1953-08-04
•
Expires: 1969-06-01
Abstract
No abstract record available.
Inventors
- 👤 Allen W Frazier
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 16:24
CPC Classifications
C; C02; C02F; C02F1/00; C02F1/42
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1781314A
Cited
US1898812A
Cited
US1937330A
Cited
US1935458A
Cited
US2572082A
Cited
US2560960A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-08-03 | 1957-02-02 | 1957-08-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-08-03 | 1961-02-02 | 1961-08-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-08-03 | 1965-02-02 | 1965-08-04 | $7700.00 | Window Closed / Lapsed |