Patents by Inventor Brian Nash

Brian Nash 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).

  • Optically clear reinforced silicone elastomers of high optical refractive index and improved mechanical properties for use in intraocular lenses
    Patent number: 5376694
    Abstract: Optically clear, reinforced cross-linked silicone elastomers of the invention contain 12 to 18 mol percent of aryl substituted siloxane units of the formula R.sub.4 R.sub.5 --SiO end blockers containing silioxane units of the formula R.sub.1 R.sub.2 R.sub.3 --SiO.5, and dialkyl siloxane units of the formula R.sub.6 R.sub.7 --SiO. R.sub.1 and .sub.2 are alkyl, aryl or substituted alkyl or substituted aryl groups, and R.sub.3 is an alkenyl group. R.sub.4 and R.sub.5 are phenyl or mono lower alkyl substituted phenyl groups. R.sub.6 and R.sub.7 are methyl or ethyl groups. The polymer has a degree of polymerization between 100 to 2000, and preferably approximately 250. The polymer also contains trimethyl silyl treated silica as a reinforcer in the weight ratio of approximately 15 to 45 parts of reinforcer to 100 parts of the polymer. After cross-linking, the polymer has properties of an optical refractive index which is at least 1.
    Type: Grant
    Filed: June 30, 1993
    Date of Patent: December 27, 1994
    Assignee: Allergan, Inc.
    Inventors: Richard Christ, Brian A. Nash, Del J. Petraitis
  • Optically clear reinforced silicone elastomers of high optical refractive index and improved mechanical properties for use in intraocular lenses
    Patent number: 5236970
    Abstract: Optically clear, reinforced cross-linked silicone elastomers of the invention contain 12 to 18 mol percent of aryl substituted siloxane units of the formula R.sub.4 R.sub.5 -SiO, end blockers containing silioxane units of the formula R.sub.1 R.sub.2 R.sub.3 -SiO..sub.5, and dialkyl siloxane units of the formula R.sub.6 R.sub.7 -SiO. R.sub.1 and R.sub.2 are alkyl, aryl or substituted alkyl or substituted aryl groups, and R.sub.3 is an alkenyl group. R.sub.4 and R.sub.5 are phenyl or mono lower alkyl substituted phenyl groups. R.sub.6 and R.sub.7 are methyl or ethyl groups. The polymer has a degree of polymerization between 100 to 2000, and preferably approximately 250. The polymer also contains trimethyl silyl treated silica as a reinforcer in the weight ratio of approximately 15 to 45 parts of reinforcer to 100 parts of the polymer. After cross-linking, the polymer has properties of an optical refractive index which is at least 1.
    Type: Grant
    Filed: April 17, 1992
    Date of Patent: August 17, 1993
    Assignee: Allergan, Inc.
    Inventors: Richard Christ, Brian A. Nash, Del J. Petraitis