Patent US1585969A successfully refreshed from Google Patents.
US2389433A
Expired / Lapsed
US
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Heating, drying, and air conditioning apparatus
Assignee: Individual
•
Filing: 1943-08-18
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Granted: 1945-11-20
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Expires: 1963-08-18
Abstract
No abstract record available.
Inventors
- 👤 Earl B Hough
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 22:33
CPC Classifications
F; F24; F24F; F24F3/00; F24F3/12; F24F3/14; D; D06; D06F; D06F58/00; D06F58/02; D06F58/20; D06F58/26; D06F58/263; F24F2003/144
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) | 1948-11-19 | 1949-05-21 | 1949-11-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1952-11-19 | 1953-05-21 | 1953-11-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1956-11-19 | 1957-05-21 | 1957-11-20 | $7700.00 | Window Closed / Lapsed |