Patent US2393660A successfully refreshed from Google Patents.
US2393660A
Expired / Lapsed
US
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Air cleaner
Assignee: Houdaille Hershey Corp
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Filing: 1942-01-30
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Granted: 1946-01-29
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Expires: 1962-01-30
Abstract
No abstract record available.
Inventors
- 👤 Joseph B Sebok
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 16:44
CPC Classifications
F; F02; F02M; F02M35/00; F02M35/10; F02M35/1015; F02M35/10196; F02M1/00; F02M1/08; F02M1/10; F02M35/02; F02M35/026; Y; Y10; Y10S; Y10S261/00; Y10S261/53; Y10T; Y10T292/00; Y10T292/20; Y10T74/00; Y10T74/20; Y10T74/20012; Y10T74/20189
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1949-01-28 | 1949-07-30 | 1950-01-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1953-01-28 | 1953-07-30 | 1954-01-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1957-01-28 | 1957-07-30 | 1958-01-29 | $7700.00 | Window Closed / Lapsed |