US2567221A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Suction cleaner
Assignee: Electrolux Corp
•
Filing: 1947-04-22
•
Granted: 1951-09-11
•
Expires: 1967-04-22
Abstract
No abstract record available.
Inventors
- 👤 Gustaf E Lofgren
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 22:36
CPC Classifications
A; A47; A47L; A47L9/00; A47L9/10; A47L9/14; A47L9/1481; A47L9/19; Y; Y10; Y10S; Y10S55/00; Y10S55/34
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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GB191113591A
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US1176721A
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US1941988A
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US2022250A
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US2192224A
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US2116017A
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US2269482A
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US2335428A
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US2376810A
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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) | 1954-09-10 | 1955-03-12 | 1955-09-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-09-10 | 1959-03-12 | 1959-09-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-09-10 | 1963-03-12 | 1963-09-11 | $7700.00 | Window Closed / Lapsed |