Patents by Inventor Amita Malik

Amita Malik 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).

  • Lanthanum containing novel polyacrylate for optical lenses
    Patent number: 8759413
    Abstract: A process for the preparation of lanthanum containing polyacrylates for optical applications. The process consists in dispersing lanthanum oxide in acrylic acid to form a monomer mixture. An aromatic carboxylic acid is added to the monomer mixture and then a cross linking agent is added thereto. Such a monomer mixture is subjected to the step of polymerization by gamma radiation.
    Type: Grant
    Filed: March 9, 2007
    Date of Patent: June 24, 2014
    Assignee: Shriram Institute for Industrial Research
    Inventors: Rakesh Kumar Khandal, Amita Malik, Geetha Seshadri, Mukti Tyagi
  • Barium containing novel polyacrylate for optical applications
    Patent number: 8586646
    Abstract: A process for the preparation of barium containing polyacrylates for optical and coating applications. The process consists in dispersing octahydrate of barium hydroxide in acrylic acid to form a monomer mixture. An aromatic carboxylic acid is added to the monomer mixture and then a cross linking agent is added thereto. Such a monomer mixture is subjected to the step of polymerization by gamma radiation.
    Type: Grant
    Filed: March 9, 2007
    Date of Patent: November 19, 2013
    Assignee: Shriram Institute for Industrial Research
    Inventors: Rakesh Kumar Khandal, Amita Malik, Geetha Seshadri, Mukti Tyagi
  • Lead containing novel polyacrylate for optical applications
    Patent number: 8586645
    Abstract: A process for the preparation of lead containing polyacrylates for optical applications. The process consists in dispersing lead monoxide in acrylic acid to form a monomer mixture. An aromatic carboxylic acid is added to the monomer mixture and then a cross linking agent is added thereto. Such a monomer mixture is subjected to the step of polymerization by gamma radiation.
    Type: Grant
    Filed: March 9, 2007
    Date of Patent: November 19, 2013
    Assignee: Shriram Institute for Industrial Research
    Inventors: Rakesh Kumar Khandal, Amita Malik, Geetha Seshadri, Mukti Tyagi
  • 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
  • Barium Containing Novel Polyacrylate for Optical Applications
    Publication number: 20100234487
    Abstract: A process for the preparation of barium containing polyacrylates for optical and coating applications. The process consists in dispersing octahydrate of barium hydroxide in acrylic acid to form a monomer mixture. An aromatic carboxylic acid is added to the monomer mixture and then a cross linking agent is added thereto. Such a monomer mixture is subjected to the step of polymerization by gamma radiation.
    Type: Application
    Filed: March 9, 2007
    Publication date: September 16, 2010
    Applicant: SHRIRAM INSTITUTE FOR INDUSTRIAL RESEARCH
    Inventors: Rakesh Kumar Khandal, Amita Malik, Geetha Seshadri, Mukti Tyagi
  • Lead Containing Novel Polyacrylate for Optical Applications
    Publication number: 20100029805
    Abstract: A process for the preparation of lead containing polyacrylates for optical applications. The process consists in dispersing lead monoxide in acrylic acid to form a monomer mixture. An aromatic carboxylic acid is added to the monomer mixture and then a cross linking agent is added thereto. Such a monomer mixture is subjected to the step of polymerization by gamma radiation.
    Type: Application
    Filed: March 9, 2007
    Publication date: February 4, 2010
    Applicant: SHRIRAM INSTITUTE FOR INDUSTRIAL RESEARCH
    Inventors: Rakesh Kumar Khandal, Amita Malik, Geetha Seshadri, 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
  • Lanthanum Containing Novel Polyacrylate for Optical Lenses
    Publication number: 20090209675
    Abstract: A process for the preparation of lanthanum containing polyacrylates for optical applications. The process consists in dispersing lanthanum oxide in acrylic acid to form a monomer mixture. An aromatic carboxylic acid is added to the monomer mixture and then a cross linking agent is added thereto. Such a monomer mixture is subjected to the step of polymerization by gamma radiation.
    Type: Application
    Filed: March 9, 2007
    Publication date: August 20, 2009
    Applicant: SHRIRAM INSTITUTE FOR INDUSTRIAL RESEARCH
    Inventors: Rakesh Kumar Khandal, Amita Malik, Geetha Seshadri, Mukti Tyagi