US2857747A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Air conditioning apparatus
Assignee: JET HEET Inc
•
Filing: 1954-10-18
•
Granted: 1958-10-28
•
Expires: 1974-10-18
Abstract
No abstract record available.
Inventors
- 👤 Calvin D Maccracken
- 👤 John J Rioux
- 👤 George N Miles
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 20:59
CPC Classifications
F; F24; F24F; F24F3/00; F24F3/044; F24F3/0442
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2121837A
Cited
US2225840A
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US2200302A
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US2495861A
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US2581709A
Cited
US2661603A
Cited
US2682757A
Cited
US2699922A
Cited
US2699796A
Cited
US2720150A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-10-27 | 1962-04-28 | 1962-10-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-10-27 | 1966-04-28 | 1966-10-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-10-27 | 1970-04-28 | 1970-10-28 | $7700.00 | Window Closed / Lapsed |