Patents by Inventor Chidambar L. Kulkarni

Chidambar L. Kulkarni 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).

  • Tinted lenses and methods of manufacture
    Patent number: 7267846
    Abstract: The present invention recognizes that lenses, such as contact lenses, can be pigmented using an ink that includes oligomers, polymers or polymerizable monomers. The ink can be used to make images on or within the lens. Images made using these inks are may be digital or analogue and can be used in a variety of printing methods, including ink-jet printing.
    Type: Grant
    Filed: October 6, 2004
    Date of Patent: September 11, 2007
    Inventors: Praful Doshi, James Edward Fox, Philip Gareth Bentley, Jagvi Ramesh Patel, Chidambar L. Kulkarni, Stephen D. Halbe, Hananiah J. Dalton
  • Novel siloxanyl acrylic monomer and gas-permeable contact lenses made therefrom
    Patent number: 4861840
    Abstract: Disclosed are a novel monomer, and oxygen-permeable copolymers made therefrom, as well as contact lenses made from said copolymers, wherein the novel monomer has the formula: ##STR1##
    Type: Grant
    Filed: December 3, 1986
    Date of Patent: August 29, 1989
    Assignee: Barnes-Hind, Inc.
    Inventors: Drahoslav Lim, Chidambar L. Kulkarni
  • Hydrophilic polymers and contact lenses made therefrom
    Patent number: 4536554
    Abstract: An interpenetrating network polymer is obtained by mixing hydrophilic monomer vinyl pyrrolidone and hydrophobic monomer (5-alkylene-m-dioxanyl) acrylic ester in the presence of at least two crosslinking agents and, optionally, hydroxyalkyl acrylic ester and catalysts and causing polymerization to occur. Contact lenses made from the polymer have high tensile strength and can absorb a high degree of water.
    Type: Grant
    Filed: February 22, 1984
    Date of Patent: August 20, 1985
    Assignee: Barnes-Hind, Inc.
    Inventors: Drahoslav Lim, Chidambar L. Kulkarni, Dennis A. Repella