Patent US2205716A successfully refreshed from Google Patents.
US2205716A
Expired / Lapsed
US
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Unit heater and air conditioner
Assignee: C A DUNHAM Co
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Filing: 1938-02-04
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Granted: 1940-06-25
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Expires: 1958-02-04
Abstract
No abstract record available.
Inventors
- 👤 Clayton A Dunham
- 👤 Jr David N Crosthwait
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 06:52
CPC Classifications
F; F28; F28D; F28D1/00; F28D1/02; F28D1/0233; F28D1/024; F24; F24F; F24F6/00; F24F6/02; F24F6/04; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7837; Y10T137/7898
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) | 1943-06-25 | 1943-12-25 | 1944-06-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1947-06-25 | 1947-12-25 | 1948-06-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1951-06-25 | 1951-12-25 | 1952-06-25 | $7700.00 | Window Closed / Lapsed |