Patents by Inventor John L. Powell

John L. Powell has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Pneumatic weighing device and method
    Patent number: 4306629
    Abstract: Disclosed is a device for detecting the weight of an article by measuring the amount of pressure required to support the article. The weighing device is characterized by a weighing table having a plurality of apertures for receiving compressed air. The pressure required to support the gross weight of an article passing over the apertures is sensed by a pressure transducer and translated into an electrical signal used to derive the actual numerical weight of the article.
    Type: Grant
    Filed: November 3, 1980
    Date of Patent: December 22, 1981
    Assignee: Geosource Inc.
    Inventor: John L. Powell
  • Recovery of ammonium decavanadate from aqueous solution
    Patent number: 4216053
    Abstract: Solid particles of ammonium decavanadate are recovered from an aqueous ammonium decavanadate solution by atomizing the solution and heating the fine droplets to vaporize the water constituent and form solid particles of ammonium decavanadate which are quickly cooled.
    Type: Grant
    Filed: October 6, 1978
    Date of Patent: August 5, 1980
    Assignee: Union Carbide Corporation
    Inventors: John L. Powell, Peter C. Rekemeyer, Earl E. Falk