Patent US3002584A successfully refreshed from Google Patents.
US3002584A
Expired / Lapsed
US
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Ductless air filter
Assignee: MAJOR IND Inc
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Filing: 1958-11-24
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Granted: 1961-10-03
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Expires: 1978-11-24
Abstract
No abstract record available.
Inventors
- 👤 Charles A Jerabek
- 👤 Spilman Raymond
- 👤 Charles F Stephenson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 01:59
CPC Classifications
B; B01; B01D; B01D46/00; B01D46/10; F; F24; F24C; F24C15/00; F24C15/20; F24F; F24F8/00; F24F8/10; F24F8/108; F24F8/15; F24F8/158
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) | 1964-10-02 | 1965-04-03 | 1965-10-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-10-02 | 1969-04-03 | 1969-10-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-10-02 | 1973-04-03 | 1973-10-03 | $7700.00 | Window Closed / Lapsed |