Patents by Inventor Alois Püntener

Alois Püntener 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).

  • Aqueous formulation for pretanning raw hides
    Patent number: 6251414
    Abstract: There is disclosed an aqueous formulation for pretanning leather, which formulation comprises (a) a reductive saccharide having a dextrose equivalent of 10 to 100, and (b) an aliphatic dialdehyde containing 2 to 8 carbon atoms, and which is devoid of mineral salts. The leather treated with the novel aqueous composition (wet white leather) is eminently suitable for further processing, especially for the manufacture of leathers which are devoid of heavy metals.
    Type: Grant
    Filed: October 30, 1998
    Date of Patent: June 26, 2001
    Assignee: TFL Ledertechnik GmbH & Co. KG
    Inventors: Alain Lauton, Markus Hess, Günter Streicher, Alois Püntener
  • Process for dyeing synthetic polyamide materials with fibre-reactive anthraquinone dyes
    Patent number: 4693727
    Abstract: Process for preparing ozone-fast dyeings on synthetic polyamide fibre materials from aqueous liquor with anthraquinone dyes which comprises using at least one anthraquinone dye which contains one or two fibre-reactive groups and one or two sulfo groups.The process according to the invention is suitable for dyeing synthetic polyamide materials producing with the monosulfoanthraquinone or disulfoanthraquinone dyes which contain one or two fibre-reactive groups level dyeings having good fastness properties, in particular good ozone fastness.
    Type: Grant
    Filed: March 18, 1986
    Date of Patent: September 15, 1987
    Assignee: Ciba-Geigy Corporation
    Inventors: James B. Bowles, Marshall White, Jr., Alois Puentener, Jean-Marie Adam, Peter Loew