Patents Examined by Michael DiVerdi
  • Heat stable, pigmented sintered material comprising a boride, carbide, silicide, nitride or phosphide
    Patent number: 6284036
    Abstract: The present invention relates to a process for pigmenting a porous sintered material comprising boride, carbide, silicide, nitride or phosphide compounds by applying a solution of a soluble pigment derivative to the non-coloured sintered material and regenerating the organic pigment by heating, whereby the organic pigment is deposited into the sintered material's pores, as well as to the new pigmented sintered materials themselves.
    Type: Grant
    Filed: November 8, 1999
    Date of Patent: September 4, 2001
    Assignee: Ciba Specialty Chemicals Corporation
    Inventors: Seiji Homma, Hans-Thomas Schacht, Zhimin Hao