US2923138A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Quick freezing apparatus
Assignee: Individual
•
Filing: 1957-05-31
•
Granted: 1960-02-02
•
Expires: 1977-05-31
Abstract
No abstract record available.
Inventors
- 👤 Wilbur G Rollins
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 11:36
CPC Classifications
F; F25; F25D; F25D13/00; F25D13/06; F25D13/067; F25D2400/00; F25D2400/30; Y; Y10; Y10S; Y10S198/00; Y10S198/952
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1832912A
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US2065358A
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US1998912A
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US2162213A
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US2237257A
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US2385140A
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US2537390A
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US2563278A
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US2751687A
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US2878776A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-02-01 | 1963-08-03 | 1964-02-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-02-01 | 1967-08-03 | 1968-02-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-02-01 | 1971-08-03 | 1972-02-02 | $7700.00 | Window Closed / Lapsed |