Patents by Inventor J. Richard Robertson

J. Richard Robertson 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: 5770669
    Abstract: Copolymers formed from dimethacrylates of polyalkylene glycols and vinylic reactive silicones having up to 20 silicon atoms in the substantial absence of additional cross-linking agents. The copolymers may include a hydrophilicity-modifying monomer. The preferred silicon is TRIS (i.e., 3-methacryloxypropyl tris(trimethylsiloxy) silane), while the preferred polyalkylene glycol is polypropylene glycol dimethacrylate. The copolymers are especially suited to use in the fabrication of soft contact lenses because of the good durability and high oxygen permeability and transmissibility. Oxygen transmissibilities of greater than 70 barrers/mm are preferred.
    Type: Grant
    Filed: April 10, 1996
    Date of Patent: June 23, 1998
    Assignee: CIBA Vision Corporation
    Inventors: J. Richard Robertson, Cheryl R. Allen
  • Patent number: 5536861
    Abstract: Antimicrobial quaternary ammonium group-containing organosilicon polymers, aqueous disinfectant solutions containing such polymers, and lenses produced from such polymers are provided herein.
    Type: Grant
    Filed: July 5, 1994
    Date of Patent: July 16, 1996
    Assignee: Ciba-Geigy Corporation
    Inventor: J. Richard Robertson
  • Patent number: 5358688
    Abstract: Antimicrobial quaternary ammonium group-containing organo-silicon polymers, aqueous disinfectant solutions containing such polymers, and lenses produced from such polymers are provided herein.
    Type: Grant
    Filed: November 16, 1993
    Date of Patent: October 25, 1994
    Assignee: Ciba-Geigy Corporation
    Inventor: J. Richard Robertson
  • Patent number: 5162530
    Abstract: Hydrophilic modifier monomers of the formula [X-T].sub.z' H' are disclosed wherein X is a reactive group, H' is a hydrophilic group and T is a divalent linking group, z' being a number up to the available valence of H', excess H' valences being taken up by hydrogen. The monomers of the invention can be used to boost the hydrophilic nature of a wide variety of polymeric materials or be polymerized themselves with varying degrees of copolymerizable monomers. They are particularly suited for making hydrophilic contact lens materials.
    Type: Grant
    Filed: June 10, 1991
    Date of Patent: November 10, 1992
    Assignee: Ciba-Geigy Corporation
    Inventors: Frank Molock, J. Richard Robertson, Jr., Kai C. Su
  • Patent number: 5070169
    Abstract: Contact lenses which are optically clear, wettable, flexible, and of high oxygen permeability in the aqueous ocular environment of use, of a block copolymer containing polysiloxane and polyoxyalkylene oxide units are disclosed, as well as the preparation thereof and methods of treating vision defects therewith.
    Type: Grant
    Filed: April 24, 1989
    Date of Patent: December 3, 1991
    Assignee: Ciba-Geigy Corporation
    Inventors: J. Richard Robertson, Kai C. Su, Merrill S. Goldenberg, Karl F. Mueller
  • Patent number: 5070170
    Abstract: Contact lenses which are optically clear, wettable, of high oxygen permeability and substantially non-swellable in the aqueous ocular envionment of use, of a block copolymer containing polysiloxane and polyoxyalkylene oxide units are disclosed, as well as the preparation thereof and methods of treating vision defects therewith.
    Type: Grant
    Filed: April 24, 1989
    Date of Patent: December 3, 1991
    Assignee: Ciba-Geigy Corporation
    Inventors: J. Richard Robertson, Kai C. Su
  • Patent number: 5053515
    Abstract: Hydrophilic modifier monomers of the formula [X--T].sub.z 'G' are disclosed wherein X is a reactive group, G' is a hydrophilic group and T is a divalent linking group, z' being a number up to the available valence of G', excess G' valences being taken up by hydrogen. The monomers of the invention can be used to boost the hydrophilic nature of a wide variety of polymeric materials or be polymerized themselves with varying degrees of copolymerizable monomers. They are particularly suited for making hydrophilic contact lens materials.
    Type: Grant
    Filed: February 5, 1990
    Date of Patent: October 1, 1991
    Assignee: Ciba-Geigy Corporation
    Inventors: Frank Molock, J. Richard Robertson, Jr., Kai C. Su
  • Patent number: 4921956
    Abstract: Hydrophilic modifier monomers of the formula [X-T].sub.z' G are disclosed wherein X is a reactive group, G is a hydrophilic group and T is a divalent linking group, z' being a number up to the available valence of G, excess G valences being taken up by hydrogen. The monomers of the invention can be used to boost the hydrophilic nature of a wide variety of polymeric materials or be polymerized themselves with varying degrees of copolymerizable monomers. They are particularly suited for making hydrophilic contact lens materials.
    Type: Grant
    Filed: June 21, 1989
    Date of Patent: May 1, 1990
    Assignee: Ciba-Geigy Corporation
    Inventors: Frank Molock, J. Richard Robertson, Jr., Kai C. Su
  • Patent number: 4859780
    Abstract: Hydrophilic modifier monomers of the formula [X-T].sub.z 'G are disclosed wherein X is a reactive group, G is a hydrophilic group and T is a divalent linking group, z' being a number up to the available valence of G, excess G valences being taken up by hydrogen. The monomers of the invention can be used to boost the hydrophilic nature of a wide variety of polymeric materials or be polymerized themselves with varying degrees of copolymerizable monomers. They are particularly suited for making hydrophilic contact lens materials.
    Type: Grant
    Filed: February 26, 1988
    Date of Patent: August 22, 1989
    Assignee: Ciba-Geigy Corporation
    Inventors: Frank Molock, J. Richard Robertson, Jr., Kai C. Su
  • Patent number: 4740533
    Abstract: Contact lenses which are optically clear, wettable, flexible, of high oxygen permeability and substantially non-swellable in the aqueous ocular environment of use, of a block copolymer containing polysiloxane and polyoxyalkylene oxide units are disclosed, as well as the preparation thereof and methods of treating vision defects therewith.
    Type: Grant
    Filed: July 28, 1987
    Date of Patent: April 26, 1988
    Assignee: Ciba-Geigy Corporation
    Inventors: Kai C. Su, J. Richard Robertson