Patents by Inventor William S. Covington

William S. Covington 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).

  • Hydrogel lens with a simulated iris portion
    Patent number: 4824688
    Abstract: An opaque, colored, hydrogel forming material is applied by a novel apparatus to hydrated soft contact lenses and cured in situ so as to form a pattern simulating the human iris in a number of colors.
    Type: Grant
    Filed: August 1, 1986
    Date of Patent: April 25, 1989
    Inventor: William S. Covington
  • Ocular membrane and method for preparation thereof
    Patent number: 4423195
    Abstract: A composition which is hydrophobic but possesses excellent wettability comprising copolymers and terpolymers of a polysiloxane and esters of acrylic and methacrylic acids. These compositions are suitable for use as ocular membranes worn in contact with the eye which possess excellent oxygen permeability, light transmission, wettability, mucophobicity, and lipophobicity and which can be worn for extremely long periods of time and then disposed of.A method of preparing the ocular membranes is disclosed, in which the composition is place between disposable molds and cured therein. The cured, mechanically and optically finished ocular membranes are recovered by the destruction of said molds and without secondary operations.The ocular membrane is a flexible, oxygen-permeable, membrane, adapted to be inserted on the eye and worn thereon continuously for extended periods.
    Type: Grant
    Filed: December 22, 1980
    Date of Patent: December 27, 1983
    Assignee: Danker Laboratories, Inc.
    Inventor: William S. Covington
  • Ocular membrane and method for preparation thereof
    Patent number: 4291953
    Abstract: A composition which is hydrophobic but possesses excellent wettability comprising a copolymer of a polysiloxane and an ester of glycidyl alcohol and an organic acid. This copolymer is suitable for the manufacture of ocular membranes worn in contact with the eye which present excellent oxygen permeability and which can be worn for extremely long periods of time and then disposed of.A method of preparing the ocular membranes is disclosed, in which the composition is placed between disposable molds and cured therein. The cured, mechanically and optically finished ocular membranes are recovered by the destruction of said molds and without secondary operations.The ocular membrane is a flexible, oxygen-permeable, membrane, adapted to be inserted on the eye and worn thereon continuously for periods of more than one month.
    Type: Grant
    Filed: August 31, 1979
    Date of Patent: September 29, 1981
    Assignee: Permavision
    Inventor: William S. Covington
  • Polysiloxane composition
    Patent number: 4245069
    Abstract: A composition which is hydrophobic but possesses excellent wettability comprising copolymers and terpolymers of a polysiloxane and esters of acrylic and methacrylic acids. These compositions are suitable for use as ocular membranes worn in contact with the eye which possess excellent oxygen permeability, light transmission, wettability, mucophobicity, and lipophobicity and which can be worn for extremely long periods of time and then disposed of.A method of preparing the ocular membranes is disclosed, in which the composition is placed between disposable molds and cured therein. The cured, mechanically and optically finished ocular membrances are recovered by the destruction of said molds and without secondary operations.The ocular membrane is a flexible, oxygen-permeable, membrane, adapted to be inserted on the eye and worn thereon continuously for extended periods.
    Type: Grant
    Filed: December 28, 1978
    Date of Patent: January 13, 1981
    Assignee: Permavision
    Inventor: William S. Covington
  • Ocular membrane and method for preparation thereof
    Patent number: 4182723
    Abstract: A composition which is hydrophobic but possesses excellent wettability comprising a copolymer of a polysiloxane and an ester of glycidyl alcohol and an organic acid. This copolymer is suitable for the manufacture of ocular membranes worn in contact with the eye which present excellent oxygen permeability and which can be worn for extremely long periods of time and then disposed of.A method of preparing the ocular membranes is disclosed, in which the composition is placed between disposable molds and cured therein. The cured, mechanically and optically finished ocular membranes are recovered by the destruction of said molds and without secondary operations.The ocular membrane is a flexible, oxygen-permeable, membrane, adapted to be inserted on the eye and worn thereon continuously for periods of more than one month.
    Type: Grant
    Filed: November 4, 1977
    Date of Patent: January 8, 1980
    Assignee: Permavision
    Inventor: William S. Covington
  • Method of molding an ocular membrane
    Patent number: 4169119
    Abstract: A composition which is hydrophobic but possesses excellent wettability comprising a copolymer of a polysiloxane and an ester of glycidyl alcohol and an organic acid. This copolymer is suitable for the manufacture of ocular membranes worn in contact with the eye which present excellent oxygen permeability and which can be worn for extremely long periods of time and then disposed of.A method of preparing the ocular membranes is disclosed, in which the composition is placed between disposable molds and cured therein. The cured, mechanically and optically finished ocular membranes are recovered by the destruction of said molds and without secondary operations.The ocular membrane is a flexible, oxygen-permeable, membrane, adapted to be inserted on the eye and worn thereon continuously for periods of more than one month.
    Type: Grant
    Filed: April 15, 1976
    Date of Patent: September 25, 1979
    Assignee: Permavision
    Inventor: William S. Covington