Patents by Inventor Gunther Quack

Gunther Quack 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 of applying an insulating layer
    Patent number: 4756933
    Abstract: A process is disclosed for applying to sheet steel an electrically insulating layer which permits mainly a satisfactory welding of the sheets when they have been blanked and stacked. The sheet steel is contacted with a treating liquor which contains a resin that is adapted to be diluted in an alkaline aqueous medium and also contains a fluoride of a polyvalent metal, particularly aluminum fluoride, in an amount of 0.1 to 80 parts by weight per 100 parts by weight resin. The treating liquor is subsequently dried and the sheet is subjected to a stress-relieving annealing, if required.In preferred embodiments of the invention a treating liquor is employed which additionally contains borates and/or dispersed particles comprising silicate and/or polymers and which is applied by means of rollers and is dried at 120.degree. to 350.degree. C.
    Type: Grant
    Filed: July 16, 1986
    Date of Patent: July 12, 1988
    Assignee: Metallgesellschaft Aktiengesellschaft
    Inventors: Gunther Quack, Heribert Domes