Patents by Inventor Steven M. Krupinski

Steven M. Krupinski 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).

  • Patent number: 5874525
    Abstract: The residual level of monomer in a polymer may be reduced by passing a melt of the polymer through a devolatilizer column which contains an array of two or more trays having voids comprising from 15 to 50% of the surface of the tray which are offset so the voids in the upper tray are spaced over the solid areas of the tray below.
    Type: Grant
    Filed: January 24, 1997
    Date of Patent: February 23, 1999
    Assignee: Nova Chemicals Inc.
    Inventors: Steven M. Krupinski, Douglas DesRoches
  • Patent number: 5691445
    Abstract: A polymer melt may be devolatilized to less than 500, preferably less than 150 ppm of residual volatile material by injecting into the melt an amount of a super critical fluid greater than the amount of residual volatile material in the melt, typically not more than about 10 weight %, and passing the melt through a flash chamber devolatilizer at a pressure of 12 mm of Hg or less at a temperature of from 200.degree. to 350.degree. C.
    Type: Grant
    Filed: March 28, 1996
    Date of Patent: November 25, 1997
    Assignee: Novacor Chemicals (International) S.A.
    Inventors: Steven M. Krupinski, James T. McQueen