Patents by Inventor Jack R. Griffith

Jack R. Griffith 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).

  • Bonding dental porcelain
    Patent number: 4378248
    Abstract: The bonding of smooth dental porcelain using glass-ionomer cement has hitherto been difficult. The present invention incorporates particles of an ion-leachable glass, particularly a calcium fluoroaluminosilicate glass, in the dental porcelain and improves the bonding properties.
    Type: Grant
    Filed: June 30, 1981
    Date of Patent: March 29, 1983
    Inventor: Jack R. Griffith