Patents Examined by Winston Douglas
  • Catalyst for purifying exhaust gases
    Patent number: 4102813
    Abstract: A catalyst for purifying exhaust gases, comprising a carrier composed mainly of active alumina, containing near its surface a component to promote the transformation of active alumina to .alpha.-alumina when said carrier is subjected to a heat treatment in order to make the diameters of the pores near its surface larger than those of the pores in its interior, impregnated with an active catalytic component which permeates further into a portion of the interior deeper than the layer having the alumina transformation-promoting component.
    Type: Grant
    Filed: April 16, 1975
    Date of Patent: July 25, 1978
    Assignee: Toyota Jidosha Kogyo Kabushiki Kaisha
    Inventors: Sadahiro Kimura, Kiyoshi Uchida, Hiroyuki Akizuki
  • Extended pigmentary BiVO.sub.4 composition
    Patent number: 4026722
    Abstract: A composition containing BiVO.sub.4, Al.sub.2 O.sub.3, and SiO.sub.2, which is useful as a yellow pigment, and a process for the preparation thereof.
    Type: Grant
    Filed: June 22, 1976
    Date of Patent: May 31, 1977
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Richard William Hess