Patents by Inventor John Howard Groth

John Howard Groth 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).

  • Clay compositions and objects including clay compositions
    Patent number: 6824877
    Abstract: A clay composition comprises, in parts by weight on oxide basis, 10-15% Al2O3, 50-85% SiO2, 0-12.5% B2O3 and 10-20% metal oxides of the form RO or R2O.
    Type: Grant
    Filed: August 29, 2002
    Date of Patent: November 30, 2004
    Inventor: John Howard Groth