Patent US2474069A successfully refreshed from Google Patents.
US2474069A
Expired / Lapsed
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Food freezing tunnel
Assignee: Carrier Corp
•
Filing: 1945-03-16
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Granted: 1949-06-21
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Expires: 1965-03-16
Abstract
No abstract record available.
Inventors
- 👤 Silvera Americo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 03:46
CPC Classifications
F; F25; F25D; F25D13/00; F25D13/06; F25D13/067
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1930414A
Cited
US2136969A
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US2237256A
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US2265858A
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US2300229A
Cited
US2237257A
Cited
US2382084A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-06-20 | 1952-12-20 | 1953-06-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-06-20 | 1956-12-20 | 1957-06-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-06-20 | 1960-12-20 | 1961-06-21 | $7700.00 | Window Closed / Lapsed |