Patents by Inventor Anthony K. Butkus

Anthony K. Butkus 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).

  • Chrome oxide refractory composition
    Patent number: 5021375
    Abstract: Chrome oxide refractory materials which are a mixture of coarse fused chrome oxide particles and fine chrome oxide particles are disclosed as resistant to silica attack. The refractory materials have a Cr.sub.2 O.sub.3 content of at least about 98.5% and substantially no MgO.
    Type: Grant
    Filed: April 19, 1990
    Date of Patent: June 4, 1991
    Assignee: Norton Company
    Inventor: Anthony K. Butkus
  • Chromia-magnesia refractory body
    Patent number: 5010046
    Abstract: An improved chromia-magnesia refractory product of co-fused chromia-magnesia grains bonded by an in situ formed chromia bond is prepared by substantially avoiding the presence of grains that will pass through a screen with openings of 150 microns. The resultant product exhibits improved resistance to silicieous materials such as are present in coal slags.
    Type: Grant
    Filed: March 5, 1990
    Date of Patent: April 23, 1991
    Assignee: Norton Company
    Inventors: Anthony K. Butkus, Scott D. Martin
  • High temperature filter
    Patent number: 4946487
    Abstract: Filter for hot gases, comprising a mass of grains formed of a ceramic having a high melting temperature and bonded together at contact point by molten power of the same ceramic.
    Type: Grant
    Filed: November 14, 1988
    Date of Patent: August 7, 1990
    Assignee: Norton Company
    Inventor: Anthony K. Butkus
  • Furnance having dense refractory oxide liner
    Patent number: 4823359
    Abstract: A refractory product is shown in the form of a dense sintered alumina-chromia, zirconia-alumina-silica, zirconia-alumina body, or zirconia-chromia-alumina having less than about 8% of homogeneously distributed closed porosity formed by sintering an intimate interdispersion of fine particles of alumina-chromia, zirconia-alumina-silica, zirconia-alumina, or zirconia-chromia-alumina.
    Type: Grant
    Filed: November 25, 1987
    Date of Patent: April 18, 1989
    Assignee: Norton Company
    Inventors: Neil N. Ault, Anthony K. Butkus, Louis J. Trostel