US2757518A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Finned tubular heat exchange elements and quick freezing apparatus embodying such elements
Assignee: FRESH FROZEN FOODS Ltd
•
Filing: 1950-10-21
•
Granted: 1956-08-07
•
Expires: 1970-10-21
Abstract
No abstract record available.
Inventors
- 👤 Schofield Frederick Henry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 18:37
CPC Classifications
F; F28; F28F; F28F1/00; F28F1/10; F28F1/42; F28F1/422; Y; Y10; Y10S; Y10S165/00; Y10S165/904
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1854421A
Cited
FR716972A
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US1961070A
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US2142856A
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US2244800A
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US2405834A
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US2458589A
Cited
US2450109A
Cited
US2491145A
Cited
US2467668A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-08-07 | 1960-02-06 | 1960-08-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-08-07 | 1964-02-06 | 1964-08-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-08-07 | 1968-02-06 | 1968-08-07 | $7700.00 | Window Closed / Lapsed |