Patents by Inventor John J. Schwonke

John J. Schwonke 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).

  • Binderless zeolite extrudates and method of producing
    Patent number: 4381255
    Abstract: Binderless zeolite sieve extrudates are made by extruding a mixture containing about 40-60% zeolites with the remainder being a metakaolin clay that has mixed with it about 90-120% of the stoichiometric amount of sodium hydroxide to convert the clay to a zeolite. After extrusion the particles are allowed to dry age during which time most of the clay is converted to the zeolite. A further heat treatment in a dilute caustic aqueous solution insures complete crystallization with subsequent washing and calcination to produce an adsorbent product.
    Type: Grant
    Filed: January 14, 1981
    Date of Patent: April 26, 1983
    Assignee: W. R. Grace & Co.
    Inventors: Richard J. Nozemack, Chang W. Chi, John J. Schwonke