US3069068A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vacuum cleaner, the driving motor of which is arranged for running at two different velocities
Assignee: Fisker and Nielsen AS
•
Filing: 1958-07-08
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Granted: 1962-12-18
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Expires: 1978-07-08
Abstract
No abstract record available.
Inventors
- 👤 Hansen Ove Johannes Grejsen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 04:58
CPC Classifications
A; A47; A47L; A47L9/00; A47L9/28; A47L9/2868; A47L9/10; A47L9/19; A47L9/2836; A47L9/2842; A47L9/2857; H; H01; H01H; H01H35/00; H01H35/24; H01H35/40
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1904973A
Cited
US2140143A
Cited
US2046675A
Cited
US2439239A
Cited
US2588301A
Cited
US2570222A
Cited
US2758670A
Cited
US2789660A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-12-17 | 1966-06-18 | 1966-12-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-12-17 | 1970-06-18 | 1970-12-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-12-17 | 1974-06-18 | 1974-12-18 | $7700.00 | Window Closed / Lapsed |