Patents by Inventor Philip L. Angermeier

Philip L. Angermeier 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).

  • Precipitative process to prepare polyimides
    Patent number: 8536298
    Abstract: A process for preparing polyimide resins comprises stirring a diamine and a dianhydride in a solvent to form a slurry; heating the slurry to a temperature sufficient for the diamine and dianhydride to react wherein the temperature is below the melting point of the dianhydride, below the melting point of the diamine, or below the melting points of the dianhydride and diamine; and reacting the diamine and dianhydride to form a polyimide having sufficient molecular weight to precipitate from the solvent.
    Type: Grant
    Filed: May 25, 2005
    Date of Patent: September 17, 2013
    Assignee: SABIC Innovative Platics IP B.V.
    Inventors: Philip L. Angermeier, Robert Edgar Colborn, Robert R. Gallucci, Paul Edward Howson, Tara Jane Mullen, Roy Ray Odle, Albert Santo Stella, John Morgan Whitney
  • Preparation of substituted phthalic anhydrides and substituted phthalimides
    Patent number: 6576770
    Abstract: A process for the formation of halophthalic anhydrides and halogen substituted-n-alkyl-phthalimides from the corresponding substituted-n-alkyl-tetrahydrophthalimide by passing said substituted-n-alkyl-tetrahydrophthalimide over a metal catalyst, in the gaseous phase in the presence of oxygen. By selection of the reaction temperature and reaction time, high conversions and purity of the anhydride or imide can be selectively obtained.
    Type: Grant
    Filed: December 5, 2001
    Date of Patent: June 10, 2003
    Assignee: General Electric Company
    Inventors: Roy Ray Odle, Thomas Link Guggenheim, Philip L. Angermeier