Patent US2558185A successfully refreshed from Google Patents.
US2558185A
Expired / Lapsed
US
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Air cleaner and element therefor
Assignee: Individual
•
Filing: 1948-01-31
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Granted: 1951-06-26
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Expires: 1968-01-31
Abstract
No abstract record available.
Inventors
- 👤 Frederic A Leisen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 18:58
CPC Classifications
B; B01; B01D; B01D46/00; B01D47/00; B01D47/02; B01D47/025; Y; Y10; Y10T; Y10T29/00; Y10T29/18; Y10T29/185; Y10T29/49; Y10T29/496; Y10T29/49604; Y10T428/00; Y10T428/12; Y10T428/12333; Y10T428/12361
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) | 1954-06-25 | 1954-12-25 | 1955-06-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-06-25 | 1958-12-25 | 1959-06-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-06-25 | 1962-12-25 | 1963-06-26 | $7700.00 | Window Closed / Lapsed |