Patents by Inventor Fredric A. Wright

Fredric A. Wright 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).

  • Method for contacting active material with liquids and separating same
    Patent number: 5098577
    Abstract: Active or functional materials such as adsorbents, catalysts, defoamers and the like are combined with inert low density particles, preferably hollow microspheres, to provide a functional material of controlled density. This product is introduced into a liquid with a somewhat higher density under agitation for a time sufficient to accomplish the desired function. Then agitation is stopped and the spent product floats to provide easy separation.
    Type: Grant
    Filed: January 9, 1991
    Date of Patent: March 24, 1992
    Assignee: PQ Corporation
    Inventors: John R. McLaughlin, Fredric A. Wright