Patents by Inventor Subramaniam Kuppuswamy

Subramaniam Kuppuswamy 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).

  • Polyethylene Compositions and Articles Made Therefrom
    Publication number: 20190119417
    Abstract: Polyethylene compositions including at least 65 wt % ethylene derived units, based upon the total weight of the polyethylene composition, are provided.
    Type: Application
    Filed: August 30, 2018
    Publication date: April 25, 2019
    Inventors: Dongming Li, Ching-Tai Lue, Adriana S. Silva, Matthew W. Holtcamp, David F. Sanders, Laughlin G. McCullough, Matthew S. Bedoya, Subramaniam Kuppuswamy
  • Mixed Catalysts with Unbridged Hafnocenes with -CH2-SiMe3 Moieties
    Publication number: 20190040167
    Abstract: The present disclosure provides a supported catalyst system and process for use thereof. In particular, the catalyst system includes an unbridged metallocene compound, an additional unbridged metallocene compound having a structure different than the first unbridged metallocene compound, a support material and an activator. The catalyst system may be used for preparing polyolefins.
    Type: Application
    Filed: June 22, 2018
    Publication date: February 7, 2019
    Inventors: Matthew W. Holtcamp, Laughlin G. McCullough, Matthew S. Bedoya, David F. Sanders, Charles J. Harlan, Ching-Tai Lue, Subramaniam Kuppuswamy
  • Mixed Catalysts with 2,6-Bis(imino)pyridyl Iron Complexes and Bridged Hafnocenes
    Publication number: 20190040168
    Abstract: The present invention provides a supported catalyst system comprising: a bridged group 4 metallocene compound, an iron compound, specifically a 2,6-bis(imino)pyridyl iron complex, a support material and an activator. The present invention further provides a process for polymerization of monomers (such as olefin monomers) comprising contacting one or more monomers with the above supported catalyst systems.
    Type: Application
    Filed: June 22, 2018
    Publication date: February 7, 2019
    Inventors: Matthew W. Holtcamp, Xuan Ye, Charles J. Harlan, Michelle E Titone, Matthew S Bedoya, Subramaniam Kuppuswamy, Hasnain Rangwalla
  • Group 4 Catalyst Compounds and Process for Use Thereof
    Publication number: 20180237559
    Abstract: This invention relates to metallocene compounds having a group substituted at the 3 position of at least one cyclopentadienyl ring represented by the formula —CH2—SiR?3 or —CH2—CR?3 and R? is a C1 to C20 substituted or unsubstituted hydrocarbyl.
    Type: Application
    Filed: January 22, 2018
    Publication date: August 23, 2018
    Inventors: Subramaniam Kuppuswamy, Matthew W. Holtcamp, David M. Fiscus, Matthew S. Bedoya, Laughlin G. McCullough, Xuan Ye
  • Supported Catalyst Systems and Processes for Use Thereof
    Publication number: 20180237554
    Abstract: This invention relates to a supported catalyst system and process for use thereof. In particular, the catalyst system includes bridged hafnium metallocene compound, an unbridged metallocene compound, a support material and an activator. The catalyst system may be used for preparing polyolefins.
    Type: Application
    Filed: January 22, 2018
    Publication date: August 23, 2018
    Inventors: Matthew W. Holtcamp, Donna J. Crowthe, Subramaniam Kuppuswamy, Matthew S. Bedoya, Laughlin G. McCullough, Ching-Tai Lue, David M. Fiscus
  • Tridentate pincer ligand supported metal-alkylidyne and metallacycloalkylene complexes for alkyne polymerization
    Patent number: 9206266
    Abstract: Tridentate pincer ligand supported metal complexes are formed where the complex is a trianionic pincer ligand supported metal-alkylidyne complex or a tetra-anionic pincer-ligand supported metallacycloalkylene complex formed by addition of an alkyne to the trianionic pincer ligand supported metal-alkylidyne complex. The tridentate pincer ligand supported metal complex that includes a group 5-7 transition metal and an OCO trianionic pincer ligand or an alkyne adduct thereof and methods of preparing the complexes are disclosed. The use of the tridentate pincer ligand supported metal complex for the polymerization of alkynes is disclosed, where high molecular weight poly(alkyne)s can be formed in high yield. The poly(alkyne) can be a macrocyclic polymer.
    Type: Grant
    Filed: June 9, 2014
    Date of Patent: December 8, 2015
    Assignee: UNIVERSITY OF FLORIDA RESEARCH FOUNDATION, INC.
    Inventors: Adam Steven Veige, Soumya Sarkar, Kevin Patrick McGowan, Subramaniam Kuppuswamy, Christopher D. Roland
  • TRIDENTATE PINCER LIGAND SUPPORTED METAL-ALKYLIDYNE AND METALLACYCLOALKYLENE COMPLEXES FOR ALKYNE POLYMERIZATION
    Publication number: 20140309389
    Abstract: Tridentate pincer ligand supported metal complexes are formed where the complex is a trianionic pincer ligand supported metal-alkylidyne complex or a tetra-anionic pincer-ligand supported metallacycloalkylene complex formed by addition of an alkyne to the trianionic pincer ligand supported metal-alkylidyne complex. The tridentate pincer ligand supported metal complex that includes a group 5-7 transition metal and an OCO trianionic pincer ligand or an alkyne adduct thereof and methods of preparing the complexes are disclosed. The use of the tridentate pincer ligand supported metal complex for the polymerization of alkynes is disclosed, where high molecular weight poly(alkyne)s can be formed in high yield. The poly(alkyne) can be a macrocyclic polymer.
    Type: Application
    Filed: June 9, 2014
    Publication date: October 16, 2014
    Inventors: ADAM STEVEN VEIGE, SOUMYA SARKAR, KEVIN PATRICK MCGOWAN, SUBRAMANIAM KUPPUSWAMY, CHRISTOPHER D. ROLAND
  • Trianionic pincer ligands, a CR(III)/CR(V) catalytic system and its use for catalytic aerobic oxidation of organic substrates
    Patent number: 8846950
    Abstract: An embodiment of the invention is a novel Cr(V)OCO3? trianionic pincer ligand complex. Another embodiment of the invention is a catalytic method for oxidation of a substrate aerobically in the presence of a source of oxygen, where the novel Cr(V)OCO3? trianionic pincer ligand complex acts as the catalyst. The substrate can be a phosphine, amine, sulfide, alkene, alkane or a second metal complex. Another embodiment of the invention is directed to NCN pincer ligands that can form trianionic pincer ligand complexes.
    Type: Grant
    Filed: March 3, 2010
    Date of Patent: September 30, 2014
    Assignee: University of Florida Research Foundation, Inc.
    Inventors: Adam Steven Veige, Joseph Michael Falkowski, Matthew O'Reilly, Subramaniam Kuppuswamy, Kevin P. McGowan, Soumya Sarkar
  • TRIANIONIC PINCER LIGANDS, A CR(III)/CR(V) CATALYTIC SYSTEM AND ITS USE FOR CATALYTIC AEROBIC OXIDATION OF ORGANIC SUBSTRATES
    Publication number: 20110313174
    Abstract: An embodiment of the invention is a novel Cr(V) OCO3- trianionic pincer ligand complex. Another embodiment of the invention is a catalytic method for oxidation of a substrate aerobically in the presence of a source of oxygen, where the novel Cr(V) OCO3- trianionic pincer ligand complex acts as the catalyst. The substrate can be a phosphine, amine, sulfide, alkene, alkane or a second metal complex. Another embodiment of the invention is directed to NCN pincer ligands that can form trianionic pincer ligand complexes.
    Type: Application
    Filed: March 3, 2010
    Publication date: December 22, 2011
    Applicant: University of Florida Research Foundation, Inc.
    Inventors: Adam Steven Veige, Joseph Michael Falkowski, Matthew O'Reilly, Subramaniam Kuppuswamy, Kevin P. McGowan, Soumya Sarkar