Patent US2724247A successfully refreshed from Google Patents.
US2724247A
Expired / Lapsed
US
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Multi-purpose air conditioner
Assignee: General Electric Co
•
Filing: 1953-09-22
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Granted: 1955-11-22
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Expires: 1973-09-22
Abstract
No abstract record available.
Inventors
- 👤 Lowell M Kurtz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:08
CPC Classifications
F; F24; F24F; F24F11/00; F24F11/30; F24F1/00; F24F1/02; F24F1/022; F24F1/027; F24F1/028; F24F1/0284; F24F1/03; F24F1/031; F24F1/0358
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2342566A
Cited
US2332730A
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US2309224A
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US2317104A
Cited
US2401560A
Cited
US2405411A
Cited
US2391151A
Cited
US2498661A
Cited
US2535775A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-11-21 | 1959-05-23 | 1959-11-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-11-21 | 1963-05-23 | 1963-11-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-11-21 | 1967-05-23 | 1967-11-22 | $7700.00 | Window Closed / Lapsed |