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US 3,945,170 AGranted
Extension of shelf life of fresh produce
OwnerRodney F. Browninventor
Life of this patent
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Abstract
A method is disclosed for extending the shelf life of foods including washing to remove any pesticides which may be present, drying, packaging in a nonporous, sealed container and irradiating with radio frequency electromagnetic waves.
Claims2
A process for the preservation of foods including the steps of:
- 1. washing the foods as required to remove any pesticides which may be present,
- 2. placing said foods in a container of a material which is essentially airtight but which permits the passage of radio frequency waves therethrough,
- 3. sealing said container, and
- 4. irradiating said sealed container with a source of radio frequency electromagnetic energy wherein said source is capable of producing a first band of energy in the range of 20 MHz to 330 MHz and a second band of energy in the range of 50 KHz to 200 KHz, said energy being at power levels between thirty watts and three hundred watts.
1 more element
Dependencies are inferred from the claim text.