Patents by Inventor Philip S. Bollen

Philip S. Bollen 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).

  • Method to reduce deposits of terephthalic acid on cooling rolls during sheet extrusion of amorphous polyethylene terephthalate
    Patent number: 4175147
    Abstract: Physically blending small amounts of polycarbonate resin into polyethylene terephthalate resin which is to be extruded and cooled to form an unoriented amorphous sheet reduces deposits of terephthalic acid on the cooling rolls during sheet extrusion.
    Type: Grant
    Filed: October 5, 1976
    Date of Patent: November 20, 1979
    Assignee: Allied Chemical Corporation
    Inventors: Philip S. Bollen, Alfieri Degrassi
  • Films and bags of nylon 6 - nylon 6,6 blends
    Patent number: 3995084
    Abstract: In accordance with the present invention, films of a nylon 6-nylon 6,6 blend are produced by a process which comprises blending about 50 to about 80 percent by weight nylon 6 resin and correspondingly about 50 to about 20 percent by weight nylon 6,6 resin, extruding said blend at a temperature above its melting point onto a smooth moving support to form a coherent film; maintaining said support at a surface temperature in the range of about 230.degree. to about 300.degree. F. and collecting the resultant film. The resultant film has a haze value, as hereinafter defined, in the range of about 5 to about 20 percent, preferably about 8 to about 14 percent. Film having the latter range of haze values is particularly suitable for the production of cooking bags.
    Type: Grant
    Filed: February 26, 1975
    Date of Patent: November 30, 1976
    Assignee: Allied Chemical Corporation
    Inventors: Paul W. Berger, Philip S. Bollen