Patent US2776446A successfully refreshed from Google Patents.
US2776446A
Expired / Lapsed
US
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Nozzle height adjustment mechanism for suction cleaners
Assignee: Hoover Co
•
Filing: 1952-04-12
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Granted: 1957-01-08
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Expires: 1972-04-12
Abstract
No abstract record available.
Inventors
- 👤 George A Brace
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 19:28
CPC Classifications
A; A47; A47L; A47L5/00; A47L5/12; A47L5/22; A47L5/28; A47L5/32
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2067990A
Cited
US2172973A
Cited
US2172911A
Cited
GB532691A
Cited
US2325821A
Cited
US2389877A
Cited
US2409082A
Cited
US2474448A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-01-08 | 1960-07-09 | 1961-01-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-01-08 | 1964-07-09 | 1965-01-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-01-08 | 1968-07-09 | 1969-01-08 | $7700.00 | Window Closed / Lapsed |