Patents by Inventor Gouri Shankar Jha

Gouri Shankar Jha 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).

  • Process for the synthesis and preparation of polymeric materials for use in optical applications such as plastic lenses
    Patent number: 8173754
    Abstract: This invention relates to a process for the preparation of plastic material for use in optical lenses comprising the steps of: a) synthesizing lead acrylate by adding lead monoxide to NaoH, which is stirred to obtain a homogenous mixture, b) adding an inhibitor to such a monomer mixture; c) adding acrylic acid drop wise to such a monomer mixture so as to avoid the formation of by products, d) heating the mixture of step (c) to a temperature of 35 to 45° C. till a white precipitate of lead acrylate is obtained, e) filtering, washing and drying the precipitate, f) subjecting lead acrylate to the step of polymerization by stepwise heating.
    Type: Grant
    Filed: March 9, 2007
    Date of Patent: May 8, 2012
    Assignee: Shriram Institute for Industrial Research
    Inventors: Rakesh Kumar Khandal, Amita Malik, Geetha Seshadri, Gouri Shankar Jha, Mukti Tyagi
  • Process for the Synthesis and Preparation of Polymeric Materials for Use in Optical Applications Such as Plastic Lenses
    Publication number: 20100016524
    Abstract: This invention relates to a process for the preparation of plastic material for use in optical lenses comprising the steps of: a) synthesizing lead acrylate by adding lead monoxide to NaoH, which is stirred to obtain a homogenous mixture, b) adding an inhibitor to such a monomer mixture; c) adding acrylic acid drop wise to such a monomer mixture so as to avoid the formation of by products, d) heating the mixture of step (c) to a temperature of 35 to 45° C. till a white precipitate of lead acrylate is obtained, e) filtering, washing and drying the precipitate, f) subjecting lead acrylate to the step of polymerization by stepwise heating.
    Type: Application
    Filed: March 9, 2007
    Publication date: January 21, 2010
    Applicant: SHRIRAM INSTITUTE FOR INDUSTRIAL RESEARCH
    Inventors: Rakesh Kumar Khandal, Amita Malik, Geetha Seshadri, Gouri Shankar Jha, Mukti Tyagi