Patents Represented by Attorney, Agent or Law Firm Jack Shuman
  • Gas-assisted injection molding of thermosetting polymers
    Patent number: 6576170
    Abstract: Thermosetting polymer is introduced into a mold at one end thereof to fill said mold. After a predetermined length of time to permit the thermosetting polymer to polymerize along the wall of the mold to form a wall of the desired thickness, gas is introduced into said mold at the opposite end to eject the central unpolymerized portion of the thermosetting polymer from the mold, leaving behind in the mold a hollow formed article.
    Type: Grant
    Filed: April 23, 2002
    Date of Patent: June 10, 2003
    Assignee: Bulk Molding Compounds, Inc.
    Inventors: Len Nunnery, Francis Zappitelli, Jody Riddle