Patents by Inventor Fredric J. Lim

Fredric J. Lim 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).

  • Patent number: 5880171
    Abstract: A polymerizable composition for the production of high quality ophthalmic lenses is disclosed that includes:a) between 20 and 90 weight percent, and preferably, at least 50 weight percent, of urethane, epoxy, or polyester oligomers end terminated with acrylate or methacrylate (or mixtures of acrylate and methacrylate);b) between 5 and 50 to 80 percent, preferably between 10 and 40 percent, by weight of an optional diluent, such as a hydrocarbon diol end terminated with acrylate or methacrylate, or mixtures thereof, or a crosslinkable tri-, tetra-, or poly-acrylate or methacrylate, or mixtures thereof; andc) conventional optional additives, including but not limited to free radical initiators, UV absorbers, mold release agents, stabilizers, dyes, antioxidants, and wetting agents.The invention also includes ophthalmic lenses prepared from this composition and an apparatus for the production of lenses using sequential polymerization.
    Type: Grant
    Filed: January 11, 1995
    Date of Patent: March 9, 1999
    Assignee: 2C Optics, Inc.
    Inventors: Fredric J. Lim, Young C. Bae, David S. Soane
  • Patent number: 5667735
    Abstract: A method is provided for applying a coating to an ophthalmic device by applying a coating to a face of the mold used to make the device and partially curing the coating, or, if the viscosity is sufficiently high, leaving the coating uncured. Then the liquid used to form the lens is poured into the mold and the liquid and coating are concurrently cured.
    Type: Grant
    Filed: April 16, 1996
    Date of Patent: September 16, 1997
    Assignee: 2C Optics, Inc.
    Inventors: Young C. Bae, Thomas B. Ottoboni, Kwan Chan, Thai Minh Nguyen, Fredric J. Lim, David S. Soane
  • Patent number: 5551663
    Abstract: Plastic molds for ophthalmic devices and methods of making such molds are disclosed. The plastic molds are provided with abrasion resistant, release-enhancing faces formed by coatings of particular compositions of polyacryloylated alkane polyols and alkane polyols.
    Type: Grant
    Filed: September 20, 1994
    Date of Patent: September 3, 1996
    Assignee: Soane Technologies, Inc.
    Inventors: Young C. Bae, Fredric J. Lim, Thomas B. Ottoboni, David S. Soane