Patent EP0304321A1 successfully refreshed from Google Patents.
US3048960A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Air filter
Assignee: Electrolux AB
•
Filing: 1958-10-24
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Granted: 1962-08-14
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Expires: 1978-10-24
Abstract
No abstract record available.
Inventors
- 👤 Ohlson Bengt Erik
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:19
CPC Classifications
A; A47; A47L; A47L9/00; A47L9/10; A47L9/12; A47L9/122
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1499864A
Cited
US2028861A
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US2220374A
Cited
US2564845A
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US2555742A
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US2743787A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-08-13 | 1966-02-12 | 1966-08-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-08-13 | 1970-02-12 | 1970-08-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-08-13 | 1974-02-12 | 1974-08-14 | $7700.00 | Window Closed / Lapsed |