Patents by Inventor Eugene G. Castagna

Eugene G. Castagna 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 controlled degradation of propylene polymers
    Patent number: 3940379
    Abstract: A process is provided for the degradation of propylene polymers comprising contacting a propylene polymer exhibiting a first melt flow rate with oxygen or an oxygen-containing gas and an organic or inorganic peroxide; melting and working and resulting mixture in a high shear zone thereby degrading said propylene polymer; and recovering an essentially odor free propylene polymer exhibiting a second melt flow rate higher than said first melt flow rate.
    Type: Grant
    Filed: May 21, 1973
    Date of Patent: February 24, 1976
    Assignee: Dart Industries, Inc.
    Inventors: Eugene G. Castagna, Albert Schrage, Michael Repiscak
  • Process for the production of high impact compositions of polyethylene and polypropylene block copolymers
    Patent number: 3937758
    Abstract: Novel polypropylene compositions comprising blends of 85-97wt percent block copolymers of propylene and ethylene with 3-15wt percent linear polyethylene and a process therefor. The compositions exhibit improved impact and low temperature brittleness properties.
    Type: Grant
    Filed: July 1, 1975
    Date of Patent: February 10, 1976
    Assignee: Dart Industries Inc.
    Inventor: Eugene G. Castagna