Patents by Inventor Michael W. Litwin

Michael W. Litwin 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 and mold for making ophthalmic devices
    Patent number: 6869549
    Abstract: This invention provides a method and a mold for improving the release of a molded ophthalmic device from a mold. The method comprises the steps of: providing a first mold half and second mold half each having opposing top surfaces at least one of which has been hollowed out to define a cavity for forming said ophthalmic device and at least said first mold half further defining a boundary for a release element, said boundary is part of said cavity, said release element comprising a ramped surface, said cavity having a corresponding ramped surface, and said release element having its widest part near the top surface of said at least said first mold half that defines said release element therein. The mold of this invention has a hollowed-out portion as part of the cavity to provide a release element to the molded ophthalmic device.
    Type: Grant
    Filed: August 27, 2002
    Date of Patent: March 22, 2005
    Assignee: Johnson & Johnson Vision Care, Inc.
    Inventors: Scott Frederick Ansell, Michael W. Litwin, Gregory L. Berckmiller, Timothy P. Freeman, Richard J. Fox, Robert B. Phillips, Thomas R. Daniels, Richard F. Barbas, Gerald R. Krebsbach
  • Method and mold for making ophthalmic devices
    Publication number: 20030062640
    Abstract: This invention provides a method and a mold for improving the release of a molded ophthalmic device from a mold. The method comprises the steps of: providing a first mold half and second mold half each having opposing top surfaces at least one of which has been hollowed out to define a cavity for forming said ophthalmic device and at least said first mold half further defining a boundary for a release element, said boundary is part of said cavity, said release element comprising a ramped surface, said cavity having a corresponding ramped surface, and said release element having its widest part near the top surface of said at least said first mold half that defines said release element therein. The mold of this invention has a hollowed-out portion as part of the cavity to provide a release element to the molded ophthalmic device.
    Type: Application
    Filed: August 27, 2002
    Publication date: April 3, 2003
    Inventors: Scott Frederick Ansell, Michael W. Litwin, Gregory L. Berckmiller, Timothy P. Freeman, Richard J. Fox, Robert B. Phillips, Thomas R. Daniels, Richard F. Barbas, Gerald R. Krebsbach
  • Contact lens container
    Patent number: D458023
    Type: Grant
    Filed: November 12, 1999
    Date of Patent: June 4, 2002
    Assignee: Johnson & Johnson Vision Care, Inc.
    Inventors: Edward A. Dzwill, Scott Frederick Ansell, Adrianus Hendrik Kooiman, Menno Ben Kubbinga, Jan Albert Maria Windey, Michael W. Litwin, Jeffrey H. Roffman, Jongliang Wu