Patents by Inventor Venkateshwaran N. Sekharipuram

Venkateshwaran N. Sekharipuram 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).

  • Melt polymer synthesis of poly ether phosphine oxides
    Patent number: 6040416
    Abstract: A melt polymerization method for producing poly(arylene ethers phosphine oxide)s suited to optical applications comprising reacting a trimethyl silyl derivative of bisphenol and an activated aromatic dihalide, wherein either reactant is a phosphine oxide, is provided.
    Type: Grant
    Filed: February 18, 1999
    Date of Patent: March 21, 2000
    Assignees: Johnson & Johnson Vision Products, Inc., Virginia Tech Intellectual Properties, Inc.
    Inventors: Venkateshwaran N. Sekharipuram, Beverly Sue Mecham, Atul Bhatnagar, James E. McGrath
  • Optic devices formed from melt processable thermoplastic materials having a high refractive index
    Patent number: 6008299
    Abstract: This invention relates generally to optic devices such as ophthalmic lenses, lens blanks, and lens preforms, made from a thermoplastic material of a specific formula and a process for forming the same.
    Type: Grant
    Filed: August 15, 1997
    Date of Patent: December 28, 1999
    Assignees: Innotech, Inc., Johnson & Johnson Vision Care, Virginia Tech Intellectual Properties, Inc.
    Inventors: James E. McGrath, Venkateshwaran N. Sekharipuram