US2434847A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Air conditioning unit having a reversible fan wheel
Assignee: Westinghouse Electric Corp
•
Filing: 1945-03-09
•
Granted: 1948-01-20
•
Expires: 1965-03-09
Abstract
No abstract record available.
Inventors
- 👤 Harold F Hagen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 04:12
CPC Classifications
F; F24; F24F; F24F3/00; F24F3/02; Y; Y10; Y10S; Y10S415/00; Y10S415/911
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US341218A
Cited
US2021583A
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US938781A
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GB291007A
Cited
US1890521A
Cited
US1919646A
Cited
US1983023A
Cited
US2208890A
Cited
US2345536A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-01-19 | 1951-07-21 | 1952-01-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-01-19 | 1955-07-21 | 1956-01-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-01-19 | 1959-07-21 | 1960-01-20 | $7700.00 | Window Closed / Lapsed |