Patents by Inventor Subrahmanya Mudhivarthi

Subrahmanya Mudhivarthi 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).

  • Polymeric microgels for chemical mechanical planarization (CMP) processing
    Patent number: 9120952
    Abstract: Organic-inorganic composites were prepared as colloidal particles of a cross-linked, thermally responsive polymer. Hybrid PNIPAM-polysiloxane particles and composite polymeric particles with embedded nanoparticles of an inorganic metal-oxide (MOx) such as CeO2 and TiO2 were formed. To promote the incorporation of unaggregated nanoparticles, temperature responsive microspherical gels (microgels) of N-isopropylacrylamide (NIPAM) with interpenetrating (IP) linear chains of poly(acrylic acid) (PAA) were used. The organic-inorganic composition of the hybrid polymer network was controlled by changing the time for condensation and hydrolysis of the siloxane monomer during synthesis.
    Type: Grant
    Filed: October 29, 2007
    Date of Patent: September 1, 2015
    Assignee: University of South Florida
    Inventors: Vinay Gupta, Ashok Kumar, Cecil Coutinho, Subrahmanya Mudhivarthi
  • Polymeric Microgels for Chemical Mechanical Planarization (CMP) Processing
    Publication number: 20090013609
    Abstract: Organic-inorganic composites were prepared as colloidal particles of a cross-linked, thermally responsive polymer. Hybrid PNIPAM-polysiloxane particles and composite polymeric particles with embedded nanoparticles of an inorganic metal-oxide (MOx) such as CeO2 and TiO2 were formed. To promote the incorporation of unaggregated nanoparticles, temperature responsive microspherical gels (microgels) of N-isopropylacrylamide (NIPAM) with interpenetrating (IP) linear chains of poly(acrylic acid) (PAA) were used. The organic-inorganic composition of the hybrid polymer network was controlled by changing the time for condensation and hydrolysis of the siloxane monomer during synthesis.
    Type: Application
    Filed: October 29, 2007
    Publication date: January 15, 2009
    Applicant: UNIVERSITY OF SOUTH FLORIDA
    Inventors: Vinay Gupta, Ashok Kumar, Cecil Coutinho, Subrahmanya Mudhivarthi