Patents by Inventor Brian George Risch

Brian George Risch 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).

  • Optical terpolymer of polyisocyanate, polythiol and polyene monomers
    Patent number: 6777494
    Abstract: A monomer composition characterized by being curable to form a resin suitable for optical products having a balanced refractive index and Abbe's number range and good tintability comprising a polyene monomer; and polyisocyanate, polyisothiocyanate, or an isocyanate monomer containing at least one isothiocyanate group; and a monomer having two or more active hydrogen groups such as polythiols, polyamines, and polyols. The invention also provides a special process for making the composition and for curing the composition to form a resin product.
    Type: Grant
    Filed: March 29, 1999
    Date of Patent: August 17, 2004
    Assignee: Optima Inc.
    Inventors: Zhou Yang, Yin-Nian Lin, Zhenya Zhu, Brian George Risch
  • Optical terpolymer of polyisocyanate, polythiol and polyene monomers
    Patent number: 6008296
    Abstract: A monomer composition characterized by being curable to form a resin suitable for optical products having a balanced refractive index and Abbe's number range and good tintability comprising a polyene monomer; a polyisocyanate, polyisothiocyanate, or an isocyanate monomer containing at least one isothiocyanate group; and a monomer having two or more active hydrogen groups such as polythiols, polyamines, and polyols. The invention also provides a special process for making the composition and for curing the composition to form a resin product.
    Type: Grant
    Filed: April 19, 1995
    Date of Patent: December 28, 1999
    Assignee: Optima, Inc.
    Inventors: Zhou Yang, Yin-Nian Lin, Zhenya Zhu, Brian George Risch