Patent US2730874A successfully refreshed from Google Patents.
US2730874A
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Air conditioner employing an expansion evaporation air cycle
Assignee: Garrett Corp
•
Filing: 1949-10-14
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Granted: 1956-01-17
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Expires: 1969-10-14
Abstract
No abstract record available.
Inventors
- 👤 Helmut R Schelp
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 20:16
CPC Classifications
B; B60; B60H; B60H1/00; B60H1/32; B60H1/3202; F; F24; F24F; F24F5/00; F24F5/0085; F25; F25B; F25B9/00; F25B9/002; F25B9/004
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1952281A
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US2069269A
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US2175162A
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US2175163A
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US2184613A
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US2304151A
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US2453923A
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US2477931A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-01-16 | 1959-07-18 | 1960-01-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-01-16 | 1963-07-18 | 1964-01-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-01-16 | 1967-07-18 | 1968-01-17 | $7700.00 | Window Closed / Lapsed |