US3294553A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Immersion freezing of strawberries
Assignee: Airco Inc
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Filing: 1963-07-11
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Granted: 1966-12-27
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Expires: 1983-07-11
Abstract
No abstract record available.
Inventors
- 👤 Ernest J Benson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 23:20
CPC Classifications
A; A23; A23B; A23B7/00; A23B7/04; A23B7/0425
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
150 words
THE METHOD OF PRESERVING STRAWBERRIES BY FREEZING WHICH ESSENTIALLY COMPRISES IMMERSING THE STRAWBERRIES IN A LIQUEFIED GAS SELECTED FROM THE GROUP CONSISTING OF NITROGEN AND NITROUS OXIDE UNTIL THE BERRIERS ARE FROZEN FROM THE SURFACE TO A DEPTH SUCH THAT NOT MORE THAN ABOUT 40%-60% OF THE VOLUME OF EACH BERRY IS FROZEN, PERMANENTLY REMOVING THE BERRIES FROM IMMERSION IN THE LIQUEFIED GAS BEFORE ABOUT AT MOST 60% OF THE VOLUME OF EACH BERRY IS FROZEN, SAID FROZEN VOLUME CONTAINING INSUFFICIENT RESIDUAL REFRIGERATION IN ITSELF TO FREEZE THE BERRY THROUGHOUT ITS CROSS SECTION, TRANSFERRING THE BERRIES FROM THE LIQUEFIED GAS TO A TEMPERING ZONE HAVING A GASEOUS ATMOSPHERE EVOLVED FROM SAID LIQUEFIED GAS AND OF A TEMPERATURE BELOW ABOUT 0*F., MAINTAINING THE BERRIES IN THE TEMPERING ZONE UNTIL THE TEMPERATURE IN ACH BERRY EQUALIZES THROUGHOUT ITS CROSS-SECTION AT A SUB-FREEZING LEVEL, AND THEREAFTER REMOVING THE BERRIES FROM THE TEMPERING ZONE.
Claim 2
Independent Claim
150 words
THE METHOD OF PRESERVING STRAWBERRIES BY FREEZING WHICH ESSENTIALLY COMPRISES IMMERSING THE STRAWBERRIES IN A LIQUEFIED GAS SELECTED FROM THE GROUP CONSISTING OF NITROGEN AND NITROUS OXIDE UNTIL THE BERRIERS ARE FROZEN FROM THE SURFACE TO A DEPTH SUCH THAT NOT MORE THAN ABOUT 40%-60% OF THE VOLUME OF EACH BERRY IS FROZEN, PERMANENTLY REMOVING THE BERRIES FROM IMMERSION IN THE LIQUEFIED GAS BEFORE ABOUT AT MOST 60% OF THE VOLUME OF EACH BERRY IS FROZEN, SAID FROZEN VOLUME CONTAINING INSUFFICIENT RESIDUAL REFRIGERATION IN ITSELF TO FREEZE THE BERRY THROUGHOUT ITS CROSS SECTION, TRANSFERRING THE BERRIES FROM THE LIQUEFIED GAS TO A TEMPERING ZONE HAVING A GASEOUS ATMOSPHERE EVOLVED FROM SAID LIQUEFIED GAS AND OF A TEMPERATURE BELOW ABOUT 0*F., MAINTAINING THE BERRIES IN THE TEMPERING ZONE UNTIL THE TEMPERATURE IN ACH BERRY EQUALIZES THROUGHOUT ITS CROSS-SECTION AT A SUB-FREEZING LEVEL, AND THEREAFTER REMOVING THE BERRIES FROM THE TEMPERING ZONE.
References Cited (Backward Citations)
US3039276A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-12-26 | 1970-06-27 | 1970-12-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-12-26 | 1974-06-27 | 1974-12-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-12-26 | 1978-06-27 | 1978-12-27 | $7700.00 | Window Closed / Lapsed |