Patents Assigned to Ocular Technologies, Inc.
  • Gas permeable contact lens and method and materials for its manufacture
    Patent number: 4822864
    Abstract: A polymer is prepared by forming a mixture of 3-methacryloxypropytris(trimethylsiloxy) silane, methacrylic acid, cyclohexylmethacrylate, 2-hydroxypropylmethacrylate, m,p-styrylethyltrimethoxysilane, methyl methacrylate and a cross linker. A polymerization initiator is added to the mixture, and UV or thermal energy is supplied so that the mixture polymerizes to form a polymer that is transparent, hard, machinable and oxygen permeable. The polymer is cut into lenses, and the lenses are treated with acetyl chloride or another suitable chemical so that their surfaces become hydrophilic. The result is oxygen-permeable, hydrophilic, daily and extended-wear, hard contact lenses.
    Type: Grant
    Filed: September 7, 1988
    Date of Patent: April 18, 1989
    Assignee: Ocular Technologies, Inc.
    Inventor: Richard Y. S. Chen
  • Gas permeable contact lens and method and materials for its manufacture
    Patent number: 4820747
    Abstract: A polymer is prepared by forming a mixture of 3-methacryloxypropytris(trimethylsiloxy) silane, methacrylic acid, cyclohexylmethacrylate, 2-hydroxypropylmethacrylate, m,p-styrylethyltrimethoxysilane, methyl methacrylate and a cross linker. A polymerization initiator is added to the mixture, and UV or thermal energy is supplied so that the mixture polymerizes to form a polymer that is transparent, hard, machinable and oxygen permeable. The polymer is cut into lenses, and the lenses are treated with acetyl chloride or another suitable chemical so that their surfaces become hydrophilic. The result is oxygen-permeable, hydrophilic, daily and extended-wear, hard contact lenses.
    Type: Grant
    Filed: September 7, 1988
    Date of Patent: April 11, 1989
    Assignee: Ocular Technologies, Inc.
    Inventor: Richard Y. S. Chen
  • Gas permeable contact lens and method and materials for its manufacture
    Patent number: 4812598
    Abstract: A polymer is prepared by forming a mixture of 3-methacryloxypropytris(trimethylsiloxy) silane, methacrylic acid, cyclohexylmethacrylate, 2-hydroxypropylmethacrylate, m,p-styrylethyltrimethoxysilane, methyl methacrylate and a cross linker. A polymerization initiator is added to the mixture, and UV or thermal energy is supplied so that the mixture polymerizes to form a polymer that is transparent, hard, machinable and oxygen permeable. The polymer is cut into lenses, and the lenses are treated with acetyl chloride or another suitable chemical so that their surfaces become hydrophilic. The result is oxygen-permeable, hydrophilic, daily and extended-wear, hard contact lenses.
    Type: Grant
    Filed: June 18, 1987
    Date of Patent: March 14, 1989
    Assignee: Ocular Technologies, Inc.
    Inventor: Richard Y. S. Chen