Patents by Inventor Scott A. Tipler

Scott A. Tipler 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).

  • Solid state devolatilization of syndiotactic vinyl aromatic polymers with catalyst deactivation
    Patent number: 6031070
    Abstract: The present invention is an improved solid state polymer devolatilization process which comprises heating a wet feed mixture comprising polymer, residual monomer(s), process solvents and active catalyst residues in the presence of an inert gas, wherein the improvement comprises replacing the inert gas with a catalyst deactivating gas.
    Type: Grant
    Filed: January 30, 1998
    Date of Patent: February 29, 2000
    Assignee: The Dow Chemical Company
    Inventors: Gerald F. Billovits, Scott A. Tipler
  • Finishing process for syndiotactic vinyl aromatic polymers
    Patent number: 5877271
    Abstract: The present invention is an improvement in a solid state devolatilization finishing process for a wet feed material of syndiotactic vinyl aromatic polymer containing volatiles, including at least one vinyl aromatic monomer, wherein the improvement comprises: rapidly heating the wet feed material, such that the temperature of the wet feed material is increased at a rate of at least 10.degree. C./min., to a temperature between about 150.degree. C. and the melting point temperature of the syndiotactic vinyl aromatic polymer, while concurrently removing evolved volatiles.
    Type: Grant
    Filed: January 30, 1998
    Date of Patent: March 2, 1999
    Assignee: The Dow Chemical Company
    Inventors: Gerald F. Billovits, Scott A. Tipler, Thomas W. McCullough