Patent DE448936C successfully refreshed from Google Patents.
Patent US2572009A successfully refreshed from Google Patents.
US2572009A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Air drying unit
Assignee: Individual
•
Filing: 1946-12-02
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Granted: 1951-10-23
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Expires: 1966-12-02
Abstract
No abstract record available.
Inventors
- 👤 Clifford C Carson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 11:46
CPC Classifications
F; F24; F24F; F24F3/00; F24F3/12; F24F3/14; F24F3/1411; F24F2003/1458
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2088954A
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US2101555A
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US2075036A
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US2233189A
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US2079157A
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US2066847A
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US2257478A
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US2297763A
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US2315715A
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US2160831A
Cited
US2328521A
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US2309961A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-10-22 | 1955-04-23 | 1955-10-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-10-22 | 1959-04-23 | 1959-10-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-10-22 | 1963-04-23 | 1963-10-23 | $7700.00 | Window Closed / Lapsed |