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Patent US2489618A successfully refreshed from Google Patents.
US2489618A
Expired / Lapsed
US
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Air conditioning apparatus
Assignee: Individual
•
Filing: 1947-10-03
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Granted: 1949-11-29
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Expires: 1967-10-03
Abstract
No abstract record available.
Inventors
- 👤 Cantin Eugene Joseph
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 05:29
CPC Classifications
F; F24; F24F; F24F8/00; F24F8/10; F24F8/183
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-11-28 | 1953-05-30 | 1953-11-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-11-28 | 1957-05-30 | 1957-11-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-11-28 | 1961-05-30 | 1961-11-29 | $7700.00 | Window Closed / Lapsed |