US2842225A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automatic means for shaking suction cleaner filters
Assignee: Electrolux AB
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Filing: 1957-03-05
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Granted: 1958-07-08
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Expires: 1977-03-05
Abstract
No abstract record available.
Inventors
- 👤 Wahlborg Karl John
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 00:51
CPC Classifications
B; B01; B01D; B01D46/00; B01D46/10; B01D46/42; B01D46/4272; B01D46/52; B01D46/521; B01D46/66; B01D46/74; B01D46/76; B01D2279/00; B01D2279/55; Y; Y10; Y10S; Y10S55/00; Y10S55/03
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-07-07 | 1962-01-06 | 1962-07-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-07-07 | 1966-01-06 | 1966-07-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-07-07 | 1970-01-06 | 1970-07-08 | $7700.00 | Window Closed / Lapsed |