Patents by Inventor Arnulf R. Lapple

Arnulf R. Lapple 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).

  • Liquid preparation of cationic dye mixture containing aliphatic carboxylic acid for black dyeing
    Patent number: 4536185
    Abstract: A novel liquid preparation containing a mixture of dyes according to claim 1, an aliphatic carboxylic acid, and optionally water and organic solvents. This novel preparation is storage-stable and temperature-stable and can be used in particular for dyeing polyacrylonitrile materials in black shades, the dyeings obtained having a neutral shade, negligible change of shade in artificial light and very good fastness to light.
    Type: Grant
    Filed: December 23, 1983
    Date of Patent: August 20, 1985
    Assignee: Ciba-Geigy Corporation
    Inventors: Arnulf R. Lapple, Alex Nicopoulos
  • Solid dye mixtures for dyeing polyacrylonitrile navy blue to black
    Patent number: 4508536
    Abstract: A preparation containing a mixture of dyes for dyeing polyacrylonitrile materials in navy blue to black shades, the dyeings obtained being distinguished in particular by a very good fastness to light.
    Type: Grant
    Filed: November 14, 1983
    Date of Patent: April 2, 1985
    Assignee: Ciba-Geigy Corporation
    Inventors: Paul Erzinger, Arnulf R. Lapple