Patent US2648202A successfully refreshed from Google Patents.
US2648202A
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Humidity regulating apparatus
Assignee: WALTER HAERTEL Co
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Filing: 1951-01-20
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Granted: 1953-08-11
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Expires: 1971-01-20
Abstract
No abstract record available.
Inventors
- 👤 Cyril J Otterholm
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 23:11
CPC Classifications
F; F24; F24F; F24F3/00; F24F3/12; F24F3/14; F24F3/1405; F24F1/00; F24F1/02; F24F1/022; F24F1/029; F24F1/0358; F24F1/028; F24F1/0287; F24F1/04; F24F13/00; F24F13/22; F24F2003/144; F24F2003/1446; F24F2003/1452
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) | 1956-08-10 | 1957-02-09 | 1957-08-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-08-10 | 1961-02-09 | 1961-08-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-08-10 | 1965-02-09 | 1965-08-11 | $7700.00 | Window Closed / Lapsed |