Patents by Inventor John P. Skilbeck

John P. Skilbeck 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).

  • Water assisted devolatilization
    Patent number: 5380822
    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 water 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 8 mm of Hg or less at a temperature of from 200.degree. to 350.degree. C.
    Type: Grant
    Filed: May 27, 1993
    Date of Patent: January 10, 1995
    Assignee: Novacor Chemicals (International) S.A.
    Inventor: John P. Skilbeck
  • Fluid assisted devolatilization
    Patent number: 5350813
    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 fluid which will condense but not freeze at pressures of less than about 20 mm Hg, in an amount greater than the amount of residual volatile material in the polymer melt, typically not more than about 10 weight % and passing the melt through a zone of pressure of 8 mm of Hg or less at a temperature of from 200.degree. to 350.degree. C.
    Type: Grant
    Filed: May 27, 1993
    Date of Patent: September 27, 1994
    Assignee: Novacor Chemicals (International) S.A.
    Inventor: John P. Skilbeck
  • Low odor polyphenylene ether/polystyrene process
    Patent number: 4994217
    Abstract: Low odor polyphenylene ether/polystyrene resins are produced in a process by solution blending low odor polyphenylene ether and polystyrene resins and passing the solution through devolatilizers prior to recovery.
    Type: Grant
    Filed: December 29, 1988
    Date of Patent: February 19, 1991
    Assignee: General Electric Company
    Inventors: John P. Banevicius, William M. Bunting, Alexandros Hasson, Susan J. Hathaway, William E. Pecak, John P. Skilbeck
  • Method for devolatilizing polymer solutions
    Patent number: 4808262
    Abstract: A method and apparatus for devolatilizing high viscosity polymer solutions are provided wherein high viscosity polymer solutions are heated along a short zone of indirect heat exchange. The residence time within the zone of indirect heat exchange ranges from approximately 5 seconds to 120 seconds.
    Type: Grant
    Filed: December 7, 1987
    Date of Patent: February 28, 1989
    Assignee: General Electric Company
    Inventors: Viney P. Aneja, John P. Skilbeck