Patents by Inventor Senthilkumar Umapathy

Senthilkumar Umapathy 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).

  • Hydrophilic macromers and hydrogels comprising the same
    Patent number: 10101499
    Abstract: A composition, suitable for use in producing hydrogel polymer films from which biomedical devices such as contact lenses can be made, comprising at least one hydrophilic silicone macromer.
    Type: Grant
    Filed: September 22, 2014
    Date of Patent: October 16, 2018
    Assignee: MOMENTIVE PERFORMANCE MATERIALS INC.
    Inventors: Anubhav Saxena, Monjit Phukan, Shreedhar Bhat, Kenrick M. Lewis, Senthilkumar Umapathy
  • Hydrophilic silicone monomers, process for preparation thereof and thin films containing the same
    Patent number: 9459378
    Abstract: The present invention relates to a fast curing compositions comprising a (meth)acrylamide functionalized hydrophilic silicone monomers having a polyether moiety containing a branched linking group. In one embodiment, such compositions are useful for preparing water-absorbing silicone-hydrogel films for contact lens applications. In one embodiment, the (meth)acrylamide monomers disclosed here have a branched linking group on the polyether moiety which makes it possible to produce hydrophilic polyether modified silicone copolymers without the need to separate various by-products including, but not limited to, unreacted, isomerized polyether and associated high molecular weight by-products.
    Type: Grant
    Filed: September 22, 2014
    Date of Patent: October 4, 2016
    Assignee: Momentive Performance Materials Inc.
    Inventors: Anubhav Saxena, Shreedhar Bhat, Senthilkumar Umapathy, Kenrick M. Lewis
  • Hydrophilic silicone monomers, process for their preparation and thin films containing the same
    Patent number: 9255199
    Abstract: There is provided new mono-(meth)acrylate functionalized hydrophilic silicone monomers containing a polyether with branched linking group, 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: February 18, 2014
    Date of Patent: February 9, 2016
    Assignee: Momentive Performance Materials Inc.
    Inventors: Kendall Louis Guyer, Kenrick Martin Lewis, Senthilkumar Umapathy, Anubhav Saxena, Yi-Feng Wang
  • HYDROPHILIC MACROMERS AND HYDROGELS COMPRISING THE SAME
    Publication number: 20150011667
    Abstract: A composition, suitable for use in producing hydrogel polymer films from which biomedical devices such as contact lenses can be made, comprising at least one hydrophilic silicone macromer.
    Type: Application
    Filed: September 22, 2014
    Publication date: January 8, 2015
    Inventors: Anubhav Saxena, Monjit Phukan, Shreedhar Bhat, Kenrick M. Lewis, Senthilkumar Umapathy
  • HYDROPHILIC SILICONE MONOMERS, PROCESS FOR PREPARATION THEREOF AND THIN FILMS CONTAINING THE SAME
    Publication number: 20150011661
    Abstract: The present invention relates to a fast curing compositions comprising a (meth)acrylamide functionalized hydrophilic silicone monomers having a polyether moiety containing a branched linking group. In one embodiment, such compositions are useful for preparing water-absorbing silicone-hydrogel films for contact lens applications. In one embodiment, the (meth)acrylamide monomers disclosed here have a branched linking group on the polyether moiety which makes it possible to produce hydrophilic polyether modified silicone copolymers without the need to separate various by-products including, but not limited to, unreacted, isomerized polyether and associated high molecular weight by-products.
    Type: Application
    Filed: September 22, 2014
    Publication date: January 8, 2015
    Inventors: Anubhav Saxena, Shreedhar Bhat, Senthilkumar Umapathy, Kenrick M. Lewis
  • HYDROPHILIC SILICONE MONOMERS, PROCESS FOR THEIR PREPARATION AND THIN FILMS CONTAINING THE SAME
    Publication number: 20140163135
    Abstract: There is provided new mono-(meth)acrylate functionalized hydrophilic silicone monomers containing a polyether with branched linking group, 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: February 18, 2014
    Publication date: June 12, 2014
    Inventors: Kendall Louis Guyer, Kenrick Martin Lewis, Senthilkumar Umapathy, Anubhav Saxena, Yi-Feng Wang