US2700537A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Humidity changer for air-conditioning
Assignee: ROBERT H HENLEY
•
Filing: 1951-06-29
•
Granted: 1955-01-25
•
Expires: 1971-06-29
Abstract
No abstract record available.
Inventors
- 👤 Neal A Pennington
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 12:08
CPC Classifications
F; F24; F24F; F24F3/00; F24F3/12; F24F3/14; F24F3/1411; F24F3/1423; F24F2003/1458; F24F2003/1464; F24F2203/00; F24F2203/10; F24F2203/1004; F24F2203/1012; F24F2203/1032; F24F2203/1036; F24F2203/104; F24F2203/1056; F24F2203/1072; F24F2203/108; F24F2203/1084; F24F2203/1096; Y; Y10; Y10T; Y10T74/00; Y10T74/19; Y10T74/19023; Y10T74/19074; Y10T74/19121; Y10T74/19219; Y10T74/19242
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1206977A
Cited
US1541147A
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US1481221A
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US1583238A
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US1912784A
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US2227773A
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US2223227A
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US2302807A
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US2503523A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-01-24 | 1958-07-26 | 1959-01-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-01-24 | 1962-07-26 | 1963-01-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-01-24 | 1966-07-26 | 1967-01-25 | $7700.00 | Window Closed / Lapsed |