Patent US2563938A successfully refreshed from Google Patents.
US2563938A
Expired / Lapsed
US
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Quick-freeze apparatus and method
Assignee: GEORGE H BALLANTYNE
•
Filing: 1945-07-07
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Granted: 1951-08-14
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Expires: 1965-07-07
Abstract
No abstract record available.
Inventors
- 👤 Cassius L Kirk
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 19:12
CPC Classifications
A; A23; A23B; A23B2/00; A23B2/80; A23B2/803; A23B2/8033; F; F25; F25D; F25D13/00; F25D13/06; F25D2400/00; F25D2400/30
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1932887A
Cited
US2021971A
Cited
US1998431A
Cited
GB430082A
Cited
US2237255A
Cited
US2268551A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-08-13 | 1955-02-12 | 1955-08-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-08-13 | 1959-02-12 | 1959-08-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-08-13 | 1963-02-12 | 1963-08-14 | $7700.00 | Window Closed / Lapsed |