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Patent US2722993A successfully refreshed from Google Patents.
US2722993A
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Suction cleaner having replaceable magazine fed dirt entrapping filter container
Assignee: Hoover Co
•
Filing: 1951-09-01
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Granted: 1955-11-08
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Expires: 1971-09-01
Abstract
No abstract record available.
Inventors
- 👤 Dale C Gerber
- 👤 Werner G Seck
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 23:36
CPC Classifications
A; A47; A47L; A47L9/00; A47L9/10; A47L9/14; A47L9/1427; A47L9/1481; Y; Y10; Y10S; Y10S15/00; Y10S15/08; Y10S206/00; Y10S206/82; Y10S55/00; Y10S55/03
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US893227A
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US1279171A
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US1783181A
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US2220873A
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US2338922A
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US2580642A
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US2532642A
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US2524584A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-11-07 | 1959-05-09 | 1959-11-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-11-07 | 1963-05-09 | 1963-11-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-11-07 | 1967-05-09 | 1967-11-08 | $7700.00 | Window Closed / Lapsed |