Patents by Inventor Hellmuth Pantke

Hellmuth Pantke 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).

  • Process for improving the light fastness of polyamide dyeings
    Patent number: 4544372
    Abstract: The light fastness of dyed polyamide fibre materials, in particular of the type used for manufacturing car seat covers, can be substantially improved by treating these materials, before, during or after the dyeing, with copper compounds of the compounds of the formula ##STR1## wherein R=H, OH, alkyl or cycloalkyl. The compounds (I) are distinguished by low self-colour and good stability to acid conditions.
    Type: Grant
    Filed: December 2, 1983
    Date of Patent: October 1, 1985
    Assignee: Bayer Aktiengesellschaft
    Inventors: Klaus-Peter Heise, Robert Kuth, Karl Neufang, Hellmuth Pantke, Karlfried Wedemeyer
  • Process for improving the light fastness of polyamide dyeings with copper complexes of schiff bases or ortho-hydroxy benzophenone
    Patent number: 4383835
    Abstract: The light fastness of polyamide dyeings can be improved by treating polyamide fibre materials, before, during or after dyeing, with copper complexes of the reaction products of salicylaldehydes with amines (for example cyclohexylamine), or with copper complexes of o-hydroxybenzophenones.
    Type: Grant
    Filed: October 15, 1981
    Date of Patent: May 17, 1983
    Assignee: Bayer Aktiengesellschaft
    Inventors: Reinhard Preuss, Joachim Grutze, Ulrich Beck, Hellmuth Pantke, Karl Vogel
  • Agents for improving wet fastness properties
    Patent number: 3995996
    Abstract: Improving the wet fastness properties of textile materials dyed from organic solvents with adducts ofA. a customary agent for improving wet fastness properties,B. a surface-active amine or amine oxide which contains at least one C.sub.12 -C.sub.28 -alkyl-or-alkenyl radical, whereby this radical is bound directly or via a bridging member to the aminorespectively amine oxide nitrogen atom andC. an anionic surface-active agent.
    Type: Grant
    Filed: April 27, 1973
    Date of Patent: December 7, 1976
    Assignee: Bayer Aktiengesellschaft
    Inventors: Hellmuth Pantke, Karl Vogel