Patents by Inventor Paul C. Nicolson

Paul C. Nicolson 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).

  • Peroxide disinfection method and devices therefor
    Patent number: 5468448
    Abstract: A method of disinfecting a hydrogen peroxide stable contact lens is provided wherein a contact lens is contacted with a hydrogen peroxide solution in a container and a hydrogen peroxide decomposition means is provided in said container, which means is adapted to permit the contact lens to have a cumulative (% peroxide) (min) exposure from the time said decomposition means contacts said peroxide containing solution, time zero, over a period of no greater than 12 hours of at least 20% peroxide.multidot.minute. An apparatus capable of carrying out such method is also provided herein. The hydrogen peroxide decomposition means may be, for example, a prepoisoned catalyst, a catalyst partially enclosed in a tube, a dual catalyst control system or a distributed catalyst control system.
    Type: Grant
    Filed: August 26, 1993
    Date of Patent: November 21, 1995
    Assignee: Ciba-Geigy Corporation
    Inventors: Paul C. Nicolson, Kenneth R. Seamons, Fu-Pao Tsao, Larry A. Alvord, Earl C. McCraw, Jr.
  • Method of disinfecting a contact lens and preserving a contact lens care solution
    Patent number: 5290512
    Abstract: The method of imparting antimicrobial activity to a contact lens composition by adding to the composition an effective amount of 5-chloro-2-methyl-4-isothiazolin-3-one and 2-methyl-4-isothiazolin-3-one.
    Type: Grant
    Filed: October 26, 1992
    Date of Patent: March 1, 1994
    Assignee: Ciba-Geigy Corportion
    Inventors: Shau F. Yen, Paul C. Nicolson
  • Method of imparting antimicrobial acitivity to an ophthalmic composition
    Patent number: 5256420
    Abstract: A method of imparting antimicrobial activity to an ophthalmic composition includes the step of adding a polyquaternary ammonium salt to the composition. The method may be employed, for example, for disinfecting a contact lens or preserving a solution, ointment or suspension.
    Type: Grant
    Filed: December 23, 1991
    Date of Patent: October 26, 1993
    Assignee: Ciba-Geigy Corporation
    Inventors: Fu-Pao Tsao, Paul C. Nicolson, Susan A. Littlefield