US2591490A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Air filter
Assignee: Electrolux Corp
•
Filing: 1946-03-01
•
Granted: 1952-04-01
•
Expires: 1966-03-01
Abstract
No abstract record available.
Inventors
- 👤 Oliver L Allen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 22:22
CPC Classifications
A; A47; A47L; A47L9/00; A47L9/10; A47L9/12; A47L9/122; Y; Y10; Y10T; Y10T156/00; Y10T156/17; Y10T156/1702; Y10T156/1712; Y10T156/1737; Y10T156/1739
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US963139A
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US1586863A
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US2008067A
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US2055853A
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US2156857A
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US2127397A
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US2147792A
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US2232640A
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US2241229A
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US2316891A
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US2348287A
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US2394208A
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US2391215A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-04-01 | 1955-10-01 | 1956-04-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-04-01 | 1959-10-01 | 1960-04-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-04-01 | 1963-10-01 | 1964-04-01 | $7700.00 | Window Closed / Lapsed |