Patents by Inventor Sergej-Tomislav V. Buljan

Sergej-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).

  • Titanium diboride-eased composite articles with improved fracture toughness
    Patent number: 5078031
    Abstract: Composite articles, cutting tools and wear parts are prepared by densification of a mixture comprising whiskers, fibers, or particles of hard refractory transition metal carbides, nitrides or carbonitrides uniformly distributed in a titanium diboride matrix. Optionally, other dispersoids may also be incorporated. The preferred composite article or cutting tool has a fracture toughness equal to or greater than about 2.5 MN.multidot.m.sup.1/2. Methods of preparation and use are also disclosed.
    Type: Grant
    Filed: August 31, 1989
    Date of Patent: January 7, 1992
    Assignee: GTE Laboratories Incorporated
    Inventors: Sergej-Tomislav V. Buljan, Earl G. Geary, Jr.
  • Titanium diboride-based composite articles with improved fracture toughness
    Patent number: 4889836
    Abstract: Composite articles, cutting tools and wear parts are prepared by densification of a mixture comprising whiskers, fibers, or particles of hard refractory transition metal carbides, nitrides or carbonitrides uniformly distributed in a titanium diboride matrix. Optionally, other dispersoids may also be incorporated. The preferred composite article or cutting tool has a fracture toughness equal to or greater than about 2.5 MN.multidot.m.sup.1/2. Methods of preparation and use are also disclosed.
    Type: Grant
    Filed: February 22, 1988
    Date of Patent: December 26, 1989
    Assignee: GTE Laboratories Incorporated
    Inventors: Sergej-Tomislav V. Buljan, Earl G. Geary, Jr.
  • Titanium diboride-based composite articles with alumina dispersoids, having improved fracture toughness
    Patent number: 4863490
    Abstract: Composite articles, cutting tools, and wear parts are prepared by densification of a mixture comprising alumina whiskers, chopped fibers, or particles uniformly distributed in a titanium diboride matrix. Optionally, other dispersoids may also be incorporated. The preferred composite article or cutting tool has a fracture toughness equal to or greater than about 2.5 MN/m.sup.3/2. Methods of preparation and use are also presented.
    Type: Grant
    Filed: February 22, 1988
    Date of Patent: September 5, 1989
    Assignee: GTE Laboratories Incorporated
    Inventors: Sergej-Tomislav V. Buljan, Earl G. Geary, Jr.