Patent US2522709A successfully refreshed from Google Patents.
US2522709A
Expired / Lapsed
US
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Suction cleaner
Assignee: Hoover Co
•
Filing: 1946-07-19
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Granted: 1950-09-19
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Expires: 1966-07-19
Abstract
No abstract record available.
Inventors
- 👤 Dale C Gerber
- 👤 Eugene L Snyder
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 21:38
CPC Classifications
A; A47; A47L; A47L9/00; A47L9/20; E; E04; E04F; E04F11/00; E04F11/18; E04F11/181; E04F11/1812
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) | 1953-09-18 | 1954-03-20 | 1954-09-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-09-18 | 1958-03-20 | 1958-09-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-09-18 | 1962-03-20 | 1962-09-19 | $7700.00 | Window Closed / Lapsed |