Patents by Inventor Alexei Gridnev

Alexei Gridnev 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).

  • Catalysts and methods for polymer synthesis
    Patent number: 9951096
    Abstract: The present invention provides unimolecular metal complexes having increased activity in the copolymerization of carbon dioxide and epoxides. Also provided are methods of using such metal complexes in the synthesis of polymers. According to one aspect, the present invention provides metal complexes comprising an activating species with co-catalytic activity tethered to a multidentate ligand that is coordinated to the active metal center of the complex.
    Type: Grant
    Filed: August 30, 2016
    Date of Patent: April 24, 2018
    Assignee: Saudi Aramco Technologies Company
    Inventors: Scott D. Allen, Anna E. Cherian, Chris A. Simoneau, Jay J. Farmer, Geoffrey W. Coates, Alexei Gridnev, Robert E. LaPointe
  • Methods for the synthesis of polycyclic guanidine compounds
    Patent number: 9738647
    Abstract: The present invention provides methods for the synthesis of polycyclic guanidine compounds. In certain embodiments, provided methods include the step of contacting a described reagent with a triamine compound to provide a polycyclic guanidine compound.
    Type: Grant
    Filed: January 6, 2014
    Date of Patent: August 22, 2017
    Assignee: Saudi Aramco Technologies Company
    Inventor: Alexei Gridnev
  • CATALYSTS AND METHODS FOR POLYMER SYNTHESIS
    Publication number: 20170183369
    Abstract: The present invention provides unimolecular metal complexes having increased activity in the copolymerization of carbon dioxide and epoxides. Also provided are methods of using such metal complexes in the synthesis of polymers. According to one aspect, the present invention provides metal complexes comprising an activating species with co-catalytic activity tethered to a multidentate ligand that is coordinated to the active metal center of the complex.
    Type: Application
    Filed: August 30, 2016
    Publication date: June 29, 2017
    Inventors: Scott D. Allen, Anna E. Cherian, Chris A. Simoneau, Jay J. Farmer, Geoffrey W. Coates, Alexei Gridnev, Robert E. LaPointe
  • Catalysts and methods for polymer synthesis
    Patent number: 9505878
    Abstract: The present invention provides unimolecular metal complexes having increased activity in the copolymerization of carbon dioxide and epoxides. Also provided are methods of using such metal complexes in the synthesis of polymers. According to one aspect, the present invention provides metal complexes comprising an activating species with co-catalytic activity tethered to a multidentate ligand that is coordinated to the active metal center of the complex.
    Type: Grant
    Filed: February 6, 2015
    Date of Patent: November 29, 2016
    Assignee: Novomer, Inc.
    Inventors: Scott D. Allen, Anna E. Cherian, Chris A. Simoneau, Jay J. Farmer, Geoffrey W. Coates, Alexei Gridnev, Robert E. LaPointe
  • CATALYSTS AND METHODS FOR POLYMER SYNTHESIS
    Publication number: 20150252145
    Abstract: The present invention provides unimolecular metal complexes having increased activity in the copolymerization of carbon dioxide and epoxides. Also provided are methods of using such metal complexes in the synthesis of polymers. According to one aspect, the present invention provides metal complexes comprising an activating species with co-catalytic activity tethered to a multidentate ligand that is coordinated to the active metal center of the complex.
    Type: Application
    Filed: February 6, 2015
    Publication date: September 10, 2015
    Inventors: Scott D. Allen, Anna E. Cherian, Chris A. Simoneau, Jay J. Farmer, Geoffrey W. Coates, Alexei Gridnev, Robert E. LaPointe
  • Catalysts and methods for polymer synthesis
    Patent number: 8956989
    Abstract: The present invention provides unimolecular metal complexes having increased activity in the copolymerization of carbon dioxide and epoxides. Also provided are methods of using such metal complexes in the synthesis of polymers. According to one aspect, the present invention provides metal complexes comprising an activating species with co-catalytic activity tethered to a multidentate ligand that is coordinated to the active metal center of the complex.
    Type: Grant
    Filed: January 31, 2013
    Date of Patent: February 17, 2015
    Assignee: Novomer, Inc.
    Inventors: Scott D. Allen, Anna E. Cherian, Chris A. Simoneau, Jay J. Farmer, Geoffrey W. Coates, Alexei Gridnev, Robert E. LaPointe
  • Catalysts and methods for polymer synthesis
    Patent number: 8951930
    Abstract: The present invention provides unimolecular metal complexes having increased activity in the copolymerization of carbon dioxide and epoxides. Also provided are methods of using such metal complexes in the synthesis of polymers. According to one aspect, the present invention provides metal complexes comprising an activating species with co-catalytic activity tethered to a multidentate ligand that is coordinated to the active metal center of the complex.
    Type: Grant
    Filed: January 31, 2013
    Date of Patent: February 10, 2015
    Assignee: Novomer, Inc.
    Inventors: Scott D. Allen, Anna E. Cherian, Chris A. Simoneau, Jay J. Farmer, Geoffrey W. Coates, Alexei Gridnev, Robert E. LaPointe
  • Catalysts and methods for polymer synthesis
    Patent number: 8946109
    Abstract: The present invention provides unimolecular metal complexes having increased activity in the copolymerization of carbon dioxide and epoxides. Also provided are methods of using such metal complexes in the synthesis of polymers. According to one aspect, the present invention provides metal complexes comprising an activating species with co-catalytic activity tethered to a multidentate ligand that is coordinated to the active metal center of the complex.
    Type: Grant
    Filed: January 31, 2013
    Date of Patent: February 3, 2015
    Assignee: Novomer, Inc.
    Inventors: Scott D. Allen, Anna E. Cherian, Chris A. Simoneau, Jay J. Farmer, Geoffrey W. Coates, Alexei Gridnev, Robert E. LaPointe
  • METHODS FOR THE SYNTHESIS OF POLYCYCLIC GUANIDINE COMPOUNDS
    Publication number: 20140194622
    Abstract: The present invention provides methods for the synthesis of polycyclic guanidine compounds. In certain embodiments, provided methods include the step of contacting a described reagent with a triamine compound to provide a polycyclic guanidine compound.
    Type: Application
    Filed: January 6, 2014
    Publication date: July 10, 2014
    Applicant: Novomer, Inc.
    Inventor: Alexei Gridnev
  • Methods for the synthesis of polycyclic guanidine compounds
    Patent number: 8642771
    Abstract: The present invention provides methods for the synthesis of polycyclic guanidine compounds. In certain embodiments, provided methods include the step of contacting a described reagent with a triamine compound to provide a polycyclic guanidine compound.
    Type: Grant
    Filed: December 17, 2010
    Date of Patent: February 4, 2014
    Assignee: Novomer, Inc.
    Inventor: Alexei Gridnev
  • Catalysts and methods for polymer synthesis
    Patent number: 8633123
    Abstract: The present invention provides unimolecular metal complexes having increased activity in the copolymerization of carbon dioxide and epoxides. Also provided are methods of using such metal complexes in the synthesis of polymers. According to one aspect, the present invention provides metal complexes comprising an activating species with co-catalytic activity tethered to a multidentate ligand that is coordinated to the active metal center of the complex.
    Type: Grant
    Filed: August 24, 2009
    Date of Patent: January 21, 2014
    Assignee: Novomer, Inc.
    Inventors: Scott D. Allen, Anna E. Cherian, Chris A. Simoneau, Jay J. Farmer, Geoffrey W. Coates, Alexei Gridnev, Robert E. LaPointe
  • METHODS FOR THE SYNTHESIS OF POLYCYCLIC GUANIDINE COMPOUNDS
    Publication number: 20120259112
    Abstract: The present invention provides methods for the synthesis of polycyclic guanidine compounds. In certain embodiments, provided methods include the step of contacting a described reagent with a triamine compound to provide a polycyclic guanidine compound.
    Type: Application
    Filed: December 17, 2010
    Publication date: October 11, 2012
    Applicant: Novomer, Inc.
    Inventor: Alexei Gridnev
  • CATALYSTS AND METHODS FOR POLYMER SYNTHESIS
    Publication number: 20110152497
    Abstract: The present invention provides unimolecular metal complexes having increased activity in the copolymerization of carbon dioxide and epoxides. Also provided are methods of using such metal complexes in the synthesis of polymers. According to one aspect, the present invention provides metal complexes comprising an activating species with co-catalytic activity tethered to a multidentate ligand that is coordinated to the active metal center of the complex.
    Type: Application
    Filed: August 24, 2009
    Publication date: June 23, 2011
    Applicant: NOVOMER, INC.
    Inventors: Scott D. Allen, Anna E. Cherian, Chris A. Simoneau, Jay J. Farmer, Geoffrey W. Coates, Alexei Gridnev, Robert E. LaPointe
  • INITIATION OF POLYMERIZATION BY HYDROGEN ATOM DONATION
    Publication number: 20070293595
    Abstract: This invention relates to the polymerization of vinylically-unsaturated monomers in the presence of a chain transfer catalysts where the polymerization process is initiated with hydrogen gas or a hydrogen atom donor rather than conventional free radical initiators. This invention further relates to an improved process for the polymerization of vinylically-unsaturated monomers in the presence of a chain transfer catalysts where the polymerization process is initiated with hydrogen gas.
    Type: Application
    Filed: August 31, 2007
    Publication date: December 20, 2007
    Applicant: E. I. duPont de Nemours and Company
    Inventors: Alexei Gridnev, Steven Ittel
  • Process for amination of acrylic macromonomers and products therefrom
    Publication number: 20070260067
    Abstract: Processes for forming adducts of amines with acrylic macromonomers are provided. Also provided are processes for using ring-closing reactions of the adducts to form lactams. The adducts are useful, for example, for making adhesives, surfactants, viscosity modifiers, processing aids, and other products.
    Type: Application
    Filed: December 12, 2006
    Publication date: November 8, 2007
    Inventors: Steven Ittel, Alexei Gridnev, Jennifer Anderson
  • Decolorization of oligomers
    Publication number: 20070191523
    Abstract: Methods of producing decolorized homo- and co-polymers through polymerization of monomers in presence of cobalt-complexed tetraphenyl porphyrin derivatives and decolorization of the produced polymer by exposing the polymer to a sorbent and, optionally, a solvent are disclosed herein.
    Type: Application
    Filed: November 9, 2006
    Publication date: August 16, 2007
    Inventors: Bradford Wayland, Zhi Lu, Alexei Gridnev, Thomas Darling
  • PROCESSES FOR HYDRAZINE ADDITION TO ACRYLIC MACROMONOMERS AND PRODUCTS THEREFROM
    Publication number: 20070161675
    Abstract: Processes for forming adducts of hydrazines with acrylic macromonomers are provided. Also provided are processes for using ring-closing reactions of the adducts to form aminolactams. The adducts are useful, for example, for making adhesives, surfactants, viscosity modifiers, processing aids, and other products.
    Type: Application
    Filed: December 12, 2006
    Publication date: July 12, 2007
    Applicant: E. I. DUPONT DE NEMOURS AND COMPANY
    Inventors: STEVEN ITTEL, ALEXEI GRIDNEV
  • Catalysts for catalytic chain transfer
    Publication number: 20070155887
    Abstract: Cobaloxime derivatives and methods of producing cobaloxime derivatives are disclosed herein. Methods of producing decolorized homo- and co-polymers through polymerization of monomers in presence of the cobaloxime derivatives and decolorization of the produced polymer by exposing the polymer to a sorbent and, optionally, a solvent are also disclosed herein.
    Type: Application
    Filed: November 9, 2006
    Publication date: July 5, 2007
    Inventors: Gregory Nikiforov, Alexei Gridnev
  • Pigment dispersions containing aminated acrylic macromonomer dispersant
    Publication number: 20070142546
    Abstract: A pigment dispersion useful for forming coating compositions containing dispersed pigment, a carrier solvent and an aminated macromonomer dispersant (binder) is disclosed. The aminated macromonomer dispersant is preferably prepared by the reaction of terminally unsaturated macromonomers synthesized by cobalt-catalyzed chain transfer free radical polymerizations of methacrylic monomers with monomeric or oligomeric amines.
    Type: Application
    Filed: December 12, 2006
    Publication date: June 21, 2007
    Inventors: Steven Ittel, Karyn Visscher, Alexei Gridnev
  • Polymerization of diisopropenylbenzene
    Publication number: 20060270815
    Abstract: Processes for preparing substantially linear polymers from diisopropenylbenzenes are provided. The polymers are useful in making a variety of products, including coatings, pigment dispersing agents, and stabilizers.
    Type: Application
    Filed: May 27, 2005
    Publication date: November 30, 2006
    Inventors: Steven Ittel, Alexei Gridnev