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ESC ENVIROTECH SYSTEMS CORP. RECEIVES U.S. PATENT APPROVAL

     ESC ENVIROTECH SYSTEMS CORP. RECEIVES U.S. PATENT APPROVAL
    VANCOUVER, British Columbia, July 9 /PRNewswire/ -- ESC Envirotech Systems Corp. (Vancouver: EVO) announces that its subsidiary Envirotech Alberta Inc. has received approval from the U.S. Patent Office ("USPO") pursuant to its patent application for the Radiant Plate Dryer ("RPD") technology.
    Upon completing the Examination Phase, whereby the USPO evaluates each claim to determine if it meets the stringent criteria used by the USPO to judge the merits of acceptability for patent protection, the company has thus far received acceptance of 19 claims (6 in the form as filed and 13 with minor editorial changes) of the 25 claims submitted.
    As the USPO is the senior international patent office, the filing date for a U.S. filing is the "Priority Filing Date" for all international jurisdictions, and acceptance of a patent application in the United States virtually assures acceptance in any other international jurisdiction where the company may require patent protection.
    ESC Envirotech Systems Corp., through its wholly owned operating and engineering subsidiaries has developed a revolutionary and environmentally friendly drying system called the Radiant Place Dryer "RPD."  The mobile, patent-pending machine is designed to process and dry large volumes of various industrial and municipal waste sludges, delivering recycled, sterile and "inert" revenue generating end products.
    -0-                     7/9/92
    /CONTACT:  Michael S. Gustavson, president of ESC Envirotech Systems, 604-685-8496/
    (EVO.) CO:  ESC Envirotech Systems Corp. ST:  British Columbia IN: SU: EH-JL -- LA019 -- 8086 07/09/92 18:40 EDT
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Publication:PR Newswire
Date:Jul 9, 1992
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