Patent US2534400A successfully refreshed from Google Patents.
US2534400A
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Fluid actuated electric circuit control for suction cleaners
Assignee: Hoover Co
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Filing: 1944-02-10
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Granted: 1950-12-19
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Expires: 1964-02-10
Abstract
No abstract record available.
Inventors
- 👤 Raymond G Bielenberg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 03:28
CPC Classifications
A; A47; A47L; A47L9/00; A47L9/28; A47L9/2857; A47L5/00; A47L5/12; A47L5/22; A47L5/28; A47L5/30; A47L9/2836; A47L9/2842; H; H01; H01H; H01H35/00; H01H35/24; H01H35/32
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1904973A
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US1942268A
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US2044830A
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US1991859A
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US2230113A
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US2301924A
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US2323554A
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US2343732A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-12-18 | 1954-06-19 | 1954-12-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-12-18 | 1958-06-19 | 1958-12-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-12-18 | 1962-06-19 | 1962-12-19 | $7700.00 | Window Closed / Lapsed |