Patents by Inventor James L. Langlois

James L. Langlois 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).

  • Marbleization of plastic materials
    Patent number: 4289408
    Abstract: Methods and apparatus for marbleizing molded parts produced by screw extruder machines. Liquid colorant is advantageously injected at a comparatively high pressure into a melt containing portion of the machine between the screw and its housing, where the melt is either completely molten or more than fifty percent molten.
    Type: Grant
    Filed: October 31, 1978
    Date of Patent: September 15, 1981
    Assignee: The Gillette Company
    Inventor: James L. Langlois
  • Marbleization of plastic materials
    Patent number: 4125582
    Abstract: Methods and apparatus for marbleizing molded parts produced by screw extruder machines. Liquid colorant is advantageously injected at a comparatively high pressure into a melt containing portion of the machine between the screw and its housing, where the melt is either completely molten or more than fifty percent molten.
    Type: Grant
    Filed: February 23, 1976
    Date of Patent: November 14, 1978
    Assignee: The Gillette Company
    Inventor: James L. Langlois