Patents by Inventor Jung-Tsien Tsao

Jung-Tsien Tsao 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).

  • Photocurable epoxy compositions containing thiopyrylium salts
    Patent number: 4139655
    Abstract: This invention relates to photocurable compositions comprising an epoxy resin and a catalytic amount of a photodecomposable thiopyrylium salt of the formula: ##STR1## WHERE R.sub.1, R.sub.2 and R.sub.3 are independently selected from the group consisting of hydrogen, alkyl containing 1 to 10 carbon atoms, cycloalkyl containing 5 to 12 carbon atoms, aryl containing 6 to 12 carbon atoms and substituted derivatives thereof, M is a metal or metalloid, X is a halogen radical, a is a whole number equal to 1 to 10 and n is a whole number equal to 1 to 3.
    Type: Grant
    Filed: May 9, 1978
    Date of Patent: February 13, 1979
    Assignee: W. R. Grace & Co.
    Inventor: Jung-Tsien Tsao