Method and apparatus for freezing and freeze-drying
First Claim
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1. A METHOD OF FREEZE-DRYING WHICH COMPRISES FREEZING A FREEZABLE SUBSTANCE TO BE DRIED BY FORCIBLY CIRCULATING A COOLING GAS IN CONTACT SUCCESSIVELY WITH COOLING SURFACES AND WITH SAID SUBSTANCE IN A CLOSED CONTAINER, AND AFTER SAID SUBSTANCE IS FROZEN SUBLIMING ICE FORMED IN IT BY HEATING IT INDIRECTLY AND UNDER VACUUM IN SAID CONTAINER AND DRAWING AWAY AND CONDENSING RESULTING
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1 Claim
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1. A METHOD OF FREEZE-DRYING WHICH COMPRISES FREEZING A FREEZABLE SUBSTANCE TO BE DRIED BY FORCIBLY CIRCULATING A COOLING GAS IN CONTACT SUCCESSIVELY WITH COOLING SURFACES AND WITH SAID SUBSTANCE IN A CLOSED CONTAINER, AND AFTER SAID SUBSTANCE IS FROZEN SUBLIMING ICE FORMED IN IT BY HEATING IT INDIRECTLY AND UNDER VACUUM IN SAID CONTAINER AND DRAWING AWAY AND CONDENSING RESULTING
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Current AssigneeGeert Seffinga
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Original AssigneeGeert Seffinga
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InventorsGEERT SEFFINGA
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Application NumberUS04/385,915Time in Patent Office902 DaysField of SearchUS Class Current34/292CPC Class CodesA23L 3/363 the materials not being tra...A23L 3/44 Freeze-dryingF26B 5/06 the process involving freezing
