Patents by Inventor Sergei-Tomislav V. Buljan

Sergei-Tomislav V. Buljan 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).

  • Coated cemented carbide tool for steel roughing applications and methods for machining
    Patent number: 4708037
    Abstract: A steel roughing grade coated cemented carbide cutting tool comprises WC grains equal to or less than 70 w/o of the tool substrate, from about 5 to about 10 w/o of a cobalt bonding phase and the remainder being metal carbide grains selected from the group TiC, TaC, NbC, HfC and combinations thereof. The average WC grain size is from about 0.9 to about 1.3 microns and less than 10% of the WC grains have a size less than 0.5 microns. The coated cemented carbide tool is coated with an adherent refractory coating layer. The coated cemented carbide cutting tool can be used to machine steel at rough and heavy rough cutting conditions.
    Type: Grant
    Filed: December 19, 1986
    Date of Patent: November 24, 1987
    Assignee: GTE Laboratories Incorporated
    Inventors: Sergei-Tomislav V. Buljan, Helmut Lingertat, J. Gary Baldoni, II, Vinod K. Sarin
  • Coated cemented carbide tool for steel roughing applications and methods for machining
    Patent number: 4698266
    Abstract: A steel roughing grade coated cemented carbide cutting tool comprises WC grains equal to or less than 70 w/o of the tool substrate, from about 5 to about 10 w/o of a cobalt bonding phase and the remainder being metal carbide grains selected from the group TiC, TaC, NbC, HfC and combinations thereof. The average WC grain size is from about 0.9 to about 1.3 microns and less than 10% of the WC grains have a size less than 0.5 microns. The coated cemented carbide tool is coated with an adherent refractory coating layer. The coated cemented carbide cutting tool can be used to machine steel at rough and heavy rough cutting conditions.
    Type: Grant
    Filed: November 18, 1985
    Date of Patent: October 6, 1987
    Assignee: GTE Laboratories Incorporated
    Inventors: Sergei-Tomislav V. Buljan, Helmut Lingertat, J. Gary Baldoni, Vinod K. Sarin