Patents by Inventor John D. Coyle

John D. Coyle 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).

  • Substituted triazine derivatives
    Patent number: 4912218
    Abstract: A triazine derivative of the formula ##STR1## wherein R is an alkyl group or an aryl group, X is S, Se or Te,n or m is 0, or each is an integer of from 1 to 3, the total sum of n+m not being greater than 3, and p or q is 0, or each is an integer of from 1 to 3, the total sum of p+q not being greater than 3. The triazines may be used in photopolymerizable compositions.
    Type: Grant
    Filed: November 5, 1987
    Date of Patent: March 27, 1990
    Assignee: Cookson Group PLC
    Inventors: John D. Coyle, Averil M. Horton
  • Method of producing silicon containing cast iron
    Patent number: 4072511
    Abstract: A method of producing cast iron including the steps of providing an initial cupola charge having a silicon content less than the silicon content required, melting the charge, conducting the melt to a mixing vessel, substantially increasing the silicon content of the melt by adding granular silicon carbide to the mixing vessel while simultaneously agitating the melt to achieve a good mix and conducting the silicon-enriched melt to a holding vessel or a molding line.
    Type: Grant
    Filed: November 26, 1976
    Date of Patent: February 7, 1978
    Assignees: Harold Huston, Ronald Beyerstedt
    Inventor: John D. Coyle