Patent US1969713A successfully refreshed from Google Patents.
US2359051A
Expired / Lapsed
US
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Air conditioning apparatus
Assignee: PLEASANTAIRE Corp OF AMERICA
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Filing: 1941-10-24
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Granted: 1944-09-26
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Expires: 1961-10-24
Abstract
No abstract record available.
Inventors
- 👤 Richard F Roper
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 23:11
CPC Classifications
F; F24; F24F; F24F1/00; F24F1/02; F24F1/022; F24F1/027
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) | 1947-09-26 | 1948-03-27 | 1948-09-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1951-09-26 | 1952-03-27 | 1952-09-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1955-09-26 | 1956-03-27 | 1956-09-26 | $7700.00 | Window Closed / Lapsed |