Patent US2481348A successfully refreshed from Google Patents.
US2481348A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Air-conditioning apparatus with defrosting means
Assignee: Trane Co
•
Filing: 1946-08-21
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Granted: 1949-09-06
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Expires: 1966-08-21
Abstract
No abstract record available.
Inventors
- 👤 Clarence L Ringquist
- 👤 Robert G Miner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 08:21
CPC Classifications
F; F25; F25D; F25D21/00; F25D21/06; F25D21/12; F25D21/125; F24; F24F; F24F5/00; F24F5/0007; F25B; F25B2347/00; F25B2347/02; F25B2347/021
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) | 1952-09-05 | 1953-03-07 | 1953-09-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-09-05 | 1957-03-07 | 1957-09-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-09-05 | 1961-03-07 | 1961-09-06 | $7700.00 | Window Closed / Lapsed |