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Patent US2997728A successfully refreshed from Google Patents.
US2997728A
Expired / Lapsed
US
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Vacuum cleaner
Assignee: Electrolux AB
•
Filing: 1958-04-01
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Granted: 1961-08-29
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Expires: 1978-04-01
Abstract
No abstract record available.
Inventors
- 👤 Gaudry Edouard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 02:59
CPC Classifications
A; A47; A47L; A47L9/00; A47L9/10; A47L9/12; A47L9/122; A47L5/00; A47L5/12; A47L5/22; A47L5/36; A47L5/362; A47L9/26
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2323275A
Cited
US2292250A
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US2314177A
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US2311369A
Cited
US2848731A
Cited
US2719600A
Cited
US2825924A
Cited
US2888093A
Cited
US2814358A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-08-28 | 1965-02-27 | 1965-08-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-08-28 | 1969-02-27 | 1969-08-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-08-28 | 1973-02-27 | 1973-08-29 | $7700.00 | Window Closed / Lapsed |