Patents by Inventor Willi Clas

Willi Clas 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).

  • Polyvinyl chloride/silicic acid/hexanetriol mixtures and process for their preparation
    Patent number: 4107123
    Abstract: A process for improving the physical and chemical properties of mixtures of polyvinyl chloride and finely divided synthetic silicic acid, which comprises mixing hexanetriol with the polyvinyl chloride and silicic acid. A composition and article of manufacture are provided. Finished products exhibit increased hardness, heat stability and resistance to discoloration, and are useful as shoe soles and floor coverings.
    Type: Grant
    Filed: May 6, 1977
    Date of Patent: August 15, 1978
    Assignee: Duetsohe Gold- und Silber-Scheideanstalt vormals Roessler
    Inventors: Willi Clas, Wolfgang Buchel