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US2583522A
Expired / Lapsed
US
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Fluid purifier
Assignee: WINSLOW ENGINEERING Co
•
Filing: 1948-04-27
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Granted: 1952-01-22
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Expires: 1968-04-27
Abstract
No abstract record available.
Inventors
- 👤 Charles A Winslow
- 👤 John J Meyer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 11:31
CPC Classifications
B; B03; B03C; B03C1/00; B03C1/02; B03C1/28
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1659136A
Cited
US1768550A
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US1745248A
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US2149764A
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US2358612A
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US2399994A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-01-21 | 1955-07-23 | 1956-01-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-01-21 | 1959-07-23 | 1960-01-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-01-21 | 1963-07-23 | 1964-01-22 | $7700.00 | Window Closed / Lapsed |