Patents by Inventor Peter G. Meissner

Peter G. Meissner 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 making polyetherimide
    Patent number: 4443592
    Abstract: Polyetherimides are formed by the blending of a first melt of organic dianhydride and a second melt of organic diamine and the resulting blend is polymerized in a continuous, steady state manner, employing an extruder reactor as the reaction chamber. The extruder reactor is provided with means for heating, evacuation of water of reaction, and transfer sections in order to achieve the steady state necessary for continuous production of a substantially uniform polyimide.
    Type: Grant
    Filed: January 21, 1983
    Date of Patent: April 17, 1984
    Assignee: General Electric Company
    Inventors: Lawrence R. Schmidt, Eric M. Lovgren, Peter G. Meissner