Patents by Inventor Joseph E. Janca

Joseph E. Janca 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).

  • Annular gated mold for the injection molding of contact lenses
    Patent number: 5928682
    Abstract: A method and apparatus for the manufacture of optical polymer contact lenses in a closed mold, where a mold cavity is created between a front curve insert and a back curve insert, the side walls of the mold cavity being formed by the inner wall of a movable annular gate collar, the collar being positioned in a retracted position during polymer dosing and then moved prior to polymer cure into an extended position to complete the mold cavity and to separate the polymer curing inside the mold cavity from any waste polymer outside of the mold cavity.
    Type: Grant
    Filed: December 21, 1995
    Date of Patent: July 27, 1999
    Assignee: Johnson & Johnson Vision Products, Inc.
    Inventors: Joseph E. Janca, Carl G. Crowe