Patents by Inventor Wilfried Heberer

Wilfried Heberer 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).

  • Method for producing polymethacrylimide foams
    Patent number: 7169339
    Abstract: The invention relates to an improved method for producing foamed material, especially poly(meth)acrylimide foams, which are foamed from polymer plates produced according to the casting method. The two-step method consists of a pre-heating step and at least one foaming step. The product obtained has a significantly smaller compressive strain, measured according to DIN 53425(ASMD 621), than prior art products.
    Type: Grant
    Filed: August 1, 2002
    Date of Patent: January 30, 2007
    Assignee: Roehm GmbH & Co. KG
    Inventors: Peter Stein, Hermann Seibert, Leonard Maier, Rainer Zimmermann, Wilfried Heberer, Werner Geyer
  • Method of producing polymethacrylimide foams
    Publication number: 20040235973
    Abstract: The invention relates to an improved method for producing foamed material, especially poly(meth)acrylimide foams, which are foamed from polymer plates produced according to the casting method. The two-step method consists of a pre-heating step and at least one foaming step. The product obtained has a significantly smaller compressive strain, measured according to DIN 53425(ASMD 621), than prior art products.
    Type: Application
    Filed: March 1, 2004
    Publication date: November 25, 2004
    Inventors: Peter Stein, Hermann Seibert, Leonard Maier, Rainer Zimmermann, Wilfried Heberer, Werner Geyer