Patents by Inventor Delef Michalski-Vollmer

Delef Michalski-Vollmer 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 for treatment of metal surfaces
    Patent number: 7901467
    Abstract: A process for treating the working surfaces of equipment used in the production and processing of polycarbonate is disclosed. The thermal treatment in an oxidative atmosphere results in resin and molded articles having improved optical quality.
    Type: Grant
    Filed: October 25, 2007
    Date of Patent: March 8, 2011
    Assignee: Bayer MaterialScience AG
    Inventors: Wolfgang Ebert, Rainer Mellis, Alexander Meyer, Bert Ruytinx, Alexander Karbach, Delef Michalski-Vollmer