Microwavable food package having valve and method of use
Patent 6380524 Issued on April 30, 2002. Estimated Expiration Date: 
August 9, 2020. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
August 9, 2020. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent References 2850391 3432087 3659584 3672907 3716180 3799427 3854023 Container having a valve movable between one-way flow and closed positions Disposable food package Automatically ventable sealed food package for use in microwave ovens InventorAssigneeApplicationNo. 635197 filed on 08/09/2000US Classes:219/725, Cookware (e.g., vessel, utensil, etc.)219/735, Having vent220/367.1, Vent in closure426/118, Packaging structure cooperating with food generated gas426/234TREATMENT OF PACKAGED PRODUCT BY ELECTRICAL OR WAVE ENERGYExaminersPrimary: Leung, Philip H.Attorney, Agent or FirmForeign Patent References
International ClassesH05B 006/80B65D 081/34 Foreign Application Priority Data1999-08-09 CHAbstractThe microwavable shipping and/or retail package described here for heating food includes a material suitable for use in a microwave oven. The food disposed in the package is preferably at least partially raw. Taking into account the water content of the food, enough liquid is present in the package for the food to be cooked in a steam atmosphere which develops in the package when heated in a microwave oven. The package has a one-way valve in a wall, which opens automatically to the outside when there is an internal excess pressure, then closes again automatically after the pressure drops, thus limiting and/or reducing the vapor pressure that develops in the package during heating in a microwave oven. The valve membrane may automatically open and automatically close until the membrane deforms during heating, thereby causing said valve to remain open.Field of SearchHaving ventWith cover Cookware (e.g., vessel, utensil, etc.) Load support For cooking or heating food Having specific electrical or wave energy feature Packaging structure cooperating with food generated gas Heating by electromagnetic wave TREATMENT OF PACKAGED PRODUCT BY ELECTRICAL OR WAVE ENERGY Vent in closure Container vent means | |
