Patents by Inventor Charles G. Orange

Charles G. Orange 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).

  • Compositions based on 2,9-Dichloroquinacridone pigments
    Patent number: 5387281
    Abstract: The present invention relates to a heat stable red pigment composition comprising a 2,9-dichloroquinacridone and a bis-(4, 5,6,7-tetrachloroisoindolin-1-on-3-ylidene)-phenylene-1,4-diamine pigment and a process for its preparation. The red pigment compositions are particularly useful for pigmenting engineering plastics.
    Type: Grant
    Filed: December 1, 1993
    Date of Patent: February 7, 1995
    Assignee: Ciba-Geigy Corporation
    Inventors: Fridolin Babler, Charles G. Orange
  • Compositions based on 2,9-dichloroquinacridone pigments
    Patent number: 5362780
    Abstract: A violet quinacridone pigment composition comprising a pigmentary 2,9-dichloroquinacridone pigment having a specific surface area below 75 m.sup.2 /g and a sulfonated indanthrone or copper phthalocyanine. The compositions have excellent fastness properties when used for pigmenting engineering plastics.
    Type: Grant
    Filed: June 15, 1993
    Date of Patent: November 8, 1994
    Assignee: Ciba-Geigy Corporation
    Inventors: Fridolin Babler, Charles G. Orange, Edward E. Jaffe