Patents by Inventor Michael R. Stepanian

Michael R. Stepanian 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).

  • Continuous process for the preparation of rubber modified polymers
    Patent number: 4451612
    Abstract: The present invention relates to a method for the production of high impact polystyrene utilizing a continuous process in place of the previously known batch polymerization techniques. The continuous process includes the steps of rubber solution preparation; prepolymerization; second stage polymerization; devolatilization and separation extrusion and pelletizing.
    Type: Grant
    Filed: September 29, 1982
    Date of Patent: May 29, 1984
    Assignee: Mobil Oil Corporation
    Inventors: Jerry C. Wang, Michael R. Stepanian