Patents by Inventor Marc G. Davidson

Marc G. Davidson 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 producing blends of tackifying resins with low molecular weight polyphenylene ethers
    Patent number: 5922815
    Abstract: The present invention provides an improved process for producing blends of tackifying resins and low molecular weight polyphenylene ether resins. This invention involves combining the resin solutions or redissolving one of the resins once isolated, in the other resin solution and isolation of the resin blend by devolatilization, precipitation, evaporation, spray drying, and/or stripping of the organic solvent.
    Type: Grant
    Filed: December 15, 1997
    Date of Patent: July 13, 1999
    Assignee: General Electric Company
    Inventors: David Frederick Aycock, Gary Gelvin, Marc G. Davidson
  • Integrated low severity alcohol-base coal liquefaction process
    Patent number: 5266189
    Abstract: An improved, low severity coal liquefaction process is disclosed. In accordance with the process, coal is first decarboxylated and demineralized with hot sulfurous acid. The decarboxylated coal is then liquefied in the presence of an alcohol and an alkali metal hydroxide. In several embodiments, alkali metal-containing materials are reclaimed to produce alkali metal hydroxide for the liquefaction step. In other embodiments, the liquefaction is conducted in the presence of a relatively high-boiling diluent such as a coal-derived liquid.
    Type: Grant
    Filed: May 1, 1992
    Date of Patent: November 30, 1993
    Assignee: Amoco Corporation
    Inventors: Joseph T. Joseph, Marc G. Davidson, Joseph D. Fox