Patent US2764880A successfully refreshed from Google Patents.
US2764880A
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Freezing apparatus
Assignee: Commonwealth Engineering Company of Ohio
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Filing: 1953-04-08
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Granted: 1956-10-02
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Expires: 1973-04-08
Abstract
No abstract record available.
Inventors
- 👤 Elwood P Wenzelberger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 18:21
CPC Classifications
F; F25; F25C; F25C1/00; F25C1/12; F25C1/14; F25C1/142
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1359911A
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US1738275A
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US2010548A
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US1996988A
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US2186887A
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US2337317A
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US2559204A
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US2559205A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-10-02 | 1960-04-02 | 1960-10-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-10-02 | 1964-04-02 | 1964-10-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-10-02 | 1968-04-02 | 1968-10-02 | $7700.00 | Window Closed / Lapsed |