Patents by Inventor Umapathy Senthilkumar

Umapathy Senthilkumar 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).

  • (Meth)acryloxy-containing trisiloxane, siloxane-containing polymers and biomedical devices therefrom
    Patent number: 9487612
    Abstract: There is provided a trisiloxane having a 3-(meth)acryloxy-substituted (hydroxylcyclohexyl)ethyl group, useful in making water absorbing silicone-hydrogel films for biomedical devices, such as contact lens, and a process for producing these monomers. This invention also provides for copolymers made from the trisiloxane having a 3-(meth)acryloxy-substituted (hydroxylcyclohexyl)ethyl group described herein.
    Type: Grant
    Filed: February 5, 2014
    Date of Patent: November 8, 2016
    Assignee: Momentive Performance Materials Inc.
    Inventors: John Nicholson, Ping Jiang, Vikram Kumar, Anubhav Saxena, Umapathy Senthilkumar, Eric Pohl, Kendall Guyer
  • Siloxane monomers containing hydrolysis resistance carbosiloxane linkage, process for their preparation and thin films containing the same for contact lens application
    Patent number: 8772367
    Abstract: There is provided new mono-(meth)acrylate functionalized silicone monomers containing carbosiloxane linkage for improved hydrolysis resistance, useful in making water absorbing silicone-hydrogel films for contact lens applications. This invention also provides homo-polymers and copolymers made from the mono-(meth)acrylate functionalized hydrophilic silicone monomers described herein. Also provided is a process for producing the monomers and polymers described herein and contact lenses produced from the same.
    Type: Grant
    Filed: March 21, 2011
    Date of Patent: July 8, 2014
    Assignee: Momentive Performance Materials Inc.
    Inventors: Anubhav Saxena, Umapathy Senthilkumar, Kenrick M. Lewis
  • SILOXANE MONOMERS CONTAINING HYDROLYSIS RESISTANCE CARBOSILOXANE LINKAGE, PROCESS FOR THEIR PREPARATION AND THIN FILMS CONTAINING THE SAME FOR CONTACT LENS APPLICATION
    Publication number: 20120245249
    Abstract: There is provided new mono-(meth)acrylate functionalized silicone monomers containing carbosiloxane linkage for improved hydrolysis resistance, useful in making water absorbing silicone-hydrogel films for contact lens applications. This invention also provides homo-polymers and copolymers made from the mono-(meth)acrylate functionalized hydrophilic silicone monomers described herein. Also provided is a process for producing the monomers and polymers described herein and contact lenses produced from the same.
    Type: Application
    Filed: March 21, 2011
    Publication date: September 27, 2012
    Applicant: Momentive Performance Materials Inc.
    Inventors: Anubhav Saxena, Umapathy Senthilkumar, Kenrick M. Lewis
  • Polyorganosiloxane demulsifier compositions and methods of making the same
    Patent number: 8030363
    Abstract: The invention relates to a method for separating emulsions of oil and water, the method comprising incorporating a demulsifying-effective amount of a polyorganosiloxane demulsifier into an emulsion comprising an oil phase and an aqueous phase. The invention also relates to compositions containing polyorganosiloxane demulsifier and the water and oil phases of an emulsion.
    Type: Grant
    Filed: January 25, 2008
    Date of Patent: October 4, 2011
    Assignee: Momentive Performance Materials Inc.
    Inventors: Anubhav Saxena, Monjit Phukan, Umapathy Senthilkumar, Ian Procter, Sigfredo Gonzalez, Kalman Koczo, Sabine Azouani, Vikram Kumar
  • Curable and cured silicone rubber compositions and methods therefor
    Patent number: 7790829
    Abstract: A method for producing a functionalized silica, compositions and methods for forming curable silicone rubber compositions by using the functionalized silica are also disclosed. Compositions and methods for forming cured silicone resin compositions and products having high transparency, high tensile strength, desirable percent elongation, or a combination of the foregoing properties are also disclosed.
    Type: Grant
    Filed: July 13, 2007
    Date of Patent: September 7, 2010
    Assignee: Momentive Performance Materials Inc.
    Inventors: Abirami Srikanth, Vikram Kumar, Helmut Steinberger, Umapathy Senthilkumar