Patents by Inventor Wolfgang Schoerkhuber

Wolfgang Schoerkhuber 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).

  • Modified colophony rosins, a process for their preparation, their use and paper-sizing agents containing such modified colophony rosins
    Patent number: 4540635
    Abstract: The colophony rosins which have been esterified with a tertiary amino alcohol are disclosed. These colophony rosins which are normally also reinforced with formaldehyde and/or an .alpha.,.beta.-unsaturated carbonyl compounds are useful in the form of an aqueous dispersion as a paper sizing agent. Disclosed are processes for the formation of such colophony rosins and paper sizing agents containing the same as well as papers so sized.
    Type: Grant
    Filed: March 15, 1984
    Date of Patent: September 10, 1985
    Assignee: Krems-Chemie, Gesellschaft mbH
    Inventors: Helmut Ronge, Erhard Prantz, Wolfgang Schoerkhuber