Patents Assigned to TFL Ledertechnik GmbH & Co. KG
  • 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
  • Compositions for the preparation of leather
    Patent number: 6033590
    Abstract: Compositions for the simultaneous retanning and fatliquoring of leather are described which may include further leather treatment agents as well.
    Type: Grant
    Filed: December 19, 1997
    Date of Patent: March 7, 2000
    Assignees: Ciba Specialty Chemicals Corp., TFL Ledertechnik GmbH & Co. KG
    Inventors: Reiner Komforth, Alain Lauton