Patents by Inventor Charlotte L. Cooper

Charlotte L. Cooper 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 of increasing the concentration of radiation-absorbing agents in optical and ophthalmic lenses
    Patent number: 5480927
    Abstract: A method and composition useful in fabricating radiation-absorbing contact lenses, especially ultraviolet (UV) and visible (tint) light-absorbing lenses. The radiation-absorber is incorporated into a contact lens in the presence of a buffer which maintains the pH near neutral. Subsequently, the radiation-absorber is chemically affixed to the lens by raising the pH to a highly basic level.
    Type: Grant
    Filed: May 20, 1994
    Date of Patent: January 2, 1996
    Assignee: Ciba Geigy Corporation
    Inventors: Robert A. Janssen, Charlotte L. Cooper, Deborah J. Mulcahy, Judy L. Peeples, Leslie F. Stebbins