Patents by Inventor Dietrich K. A. Hardt, deceased

Dietrich K. A. Hardt, deceased 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 moulding composition
    Patent number: 4381361
    Abstract: A notched-impact-resistant polyvinyl chloride moulding composition having a low shrinkage value, based on vinylchloride polymers and impact-resistant modifiers, containing from 0.01 to 5% by weight, based on the total of vinylchloride polymer and impact-resistant modifier, of liquid polysiloxanes having viscosities of from 20 to 100,000 cSt and/or solid polysiloxanes having molecular weights of from 20,000 to 500,000 and optionally conventional additives and auxiliaries.
    Type: Grant
    Filed: October 28, 1981
    Date of Patent: April 26, 1983
    Assignee: Bayer Aktiengesellschaft
    Inventors: Dietrich K. A. Hardt, deceased, Fritz Mietzsch, Otto Billinger