Patent US2671927A successfully refreshed from Google Patents.
US2671927A
Expired / Lapsed
US
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Valved cleaning tool for suction cleaners
Assignee: Hoover Co
•
Filing: 1948-06-10
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Granted: 1954-03-16
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Expires: 1968-06-10
Abstract
No abstract record available.
Inventors
- 👤 Harry B White
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 08:24
CPC Classifications
A; A47; A47L; A47L9/00; A47L9/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1050989A
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US1740001A
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US2029668A
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US2035688A
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US2239384A
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US2269447A
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US2220778A
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US2295354A
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US2500977A
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US2516205A
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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) | 1957-03-15 | 1957-09-14 | 1958-03-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-03-15 | 1961-09-14 | 1962-03-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-03-15 | 1965-09-14 | 1966-03-16 | $7700.00 | Window Closed / Lapsed |