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US3605428A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Product freezing with vapor condensation
Assignee: Frick Co Inc
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Filing: 1970-03-05
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Granted: 1971-09-20
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Expires: 1990-03-05
Abstract
Abstract FOOD OR OTHER PRODUCT IS INTRODUCED INTO A HOUSING UNSEALED AT THE TOP IN WHICH THE ATMOSPHERE IS MAINTAINED AT ALL TIMES DURING PRODUCT FREEZING AT A TEMPERATURE LOWER THAN THE SATURATION TEMPERATURE OF THE FREEZING REFRIGERANT AT ATMOSPHERIC PRESSURE. THE TEMPERATURE IS MAINTAINED BY CONSTANTLY CIRCULATING THE FREEZING REFRIGERANT OVER A LOW TEMPERATURE HEAT EXCHANGER. THE PRODUCT MAY BE SPRAYED AND IMMERSED IN THE FREEZING REFRIGERANT WHOSE SUPPLY IS CONSTANTLY CIRCULATED THROUGH A SEPARATOR FOR REMOVING PRODUCT PARTICLES, ICE AND OTHER FOREIGN MATTER.
Inventors
- 👤 Malcolm C Smith
- 👤 Milton W Garland
- 👤 Hollis C Grubb
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:48
CPC Classifications
F; F25; F25D; F25D13/00; F25D13/06; F25D17/00; F25D17/02; F25D25/00; F25D25/04; F25D9/00; F25D9/005
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-09-19 | 1975-03-21 | 1975-09-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-09-19 | 1979-03-21 | 1979-09-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-09-19 | 1983-03-21 | 1983-09-20 | $7700.00 | Window Closed / Lapsed |