Patents by Inventor Bollepalli Srinivas

Bollepalli Srinivas 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).

  • Conducting polymer-grafted carbon material for fuel cell applications
    Patent number: 7459103
    Abstract: A composition comprising particulate carbonaceous material and a conducting polymer containing hetero atoms. The composition can further comprise a metal. Devices comprising the composition can be constructed including supported electrocatalysts, membrane electrode assemblies, and fuel cells. A method for preparing the composition comprises oxidatively polymerizing with ozone a monomer of a conducting polymer containing hetero atoms in the presence of a carbonaceous material. The method grafts the conducting polymer to the carbonaceous material. The method can further comprise metallizing the polymer-grafted carbonaceous material.
    Type: Grant
    Filed: February 25, 2004
    Date of Patent: December 2, 2008
    Assignee: Columbian Chemicals Company
    Inventor: Bollepalli Srinivas
  • Sulfonated carbonaceous materials
    Patent number: 7241334
    Abstract: The present invention provides methods for the incorporation of sulfonate functional groups onto the surface of carbonaceous compounds and materials, and similarly provides several surface modified carbonaceous compounds and materials resulting therefrom.
    Type: Grant
    Filed: August 28, 2002
    Date of Patent: July 10, 2007
    Assignee: Columbian Chemicals Company
    Inventor: Bollepalli Srinivas
  • Metallized conducting polymer-grafted carbon material and method for making
    Patent number: 7195834
    Abstract: A composition comprising particulate carbonaceous material and a conducting polymer containing hetero atoms. The composition can further comprise a metal. Devices comprising the composition can be constructed including supported electrocatalysts, membrane electrode assemblies, and fuel cells. A method for preparing the composition comprises oxidatively polymerizing a monomer of a conducting polymer containing hetero atoms in the presence of a carbonaceous material wherein the oxidative polymerization takes place in the presence of a metal-containing oxidizing agent. The method grafts the conducting polymer to the carbonaceous material while essentially simultaneously metallizing the composition.
    Type: Grant
    Filed: September 2, 2003
    Date of Patent: March 27, 2007
    Assignee: Columbian Chemicals Company
    Inventor: Bollepalli Srinivas
  • Conducting polymer-grafted carbon material for fuel cell applications
    Patent number: 7175930
    Abstract: A composition comprising particulate carbonaceous material and a conducting polymer containing hetero atoms. The composition can further comprise a metal. Devices comprising the composition can be constructed including supported electrocatalysts, membrane electrode assemblies, and fuel cells. A method for preparing the composition comprises oxidatively polymerizing a monomer of a conducting polymer containing hetero atoms in the presence of a carbonaceous material. The method grafts the conducting polymer to the carbonaceous material. The method can further comprise metallizing the polymer-grafted carbonaceous material.
    Type: Grant
    Filed: May 23, 2003
    Date of Patent: February 13, 2007
    Assignee: Columbian Chemicals Company
    Inventor: Bollepalli Srinivas
  • Surface modification of carbonaceous materials by introduction of gamma keto carboxyl containing functional groups
    Patent number: 6831194
    Abstract: The present invention provides a method for the preparation of carbonaceous materials comprising a plurality of gamma-keto-carboxyl containing functional groups surface bonded thereto, and further provides several surface modified carbonaceous materials resulting therefrom.
    Type: Grant
    Filed: August 28, 2002
    Date of Patent: December 14, 2004
    Assignee: Columbian Chemicals Company
    Inventor: Bollepalli Srinivas
  • Sulfonated conducting polymer-grafted carbon material for fuel cell applications
    Publication number: 20040169165
    Abstract: A composition comprising particulate carbonaceous material and a sulfonated conducting polymer containing hetero atoms. The composition can further comprise a metal. Devices comprising the composition can be constructed including supported electrocatalysts, membrane electrode assemblies, and fuel cells. A method for preparing the composition comprises oxidatively polymerizing with ozone a monomer of a conducting polymer containing hetero atoms in the presence of a carbonaceous material and sulfonating the polymer or the monomer. The method grafts the sulfonated conducting polymer to the carbonaceous material. The method can further comprise metallizing the polymer-grafted carbonaceous material.
    Type: Application
    Filed: February 25, 2004
    Publication date: September 2, 2004
    Inventor: Bollepalli Srinivas
  • Conducting polymer-grafted carbon material for fuel cell applications
    Publication number: 20040166401
    Abstract: A composition comprising particulate carbonaceous material and a conducting polymer containing hetero atoms. The composition can further comprise a metal. Devices comprising the composition can be constructed including supported electrocatalysts, membrane electrode assemblies, and fuel cells. A method for preparing the composition comprises oxidatively polymerizing with ozone a monomer of a conducting polymer containing hetero atoms in the presence of a carbonaceous material. The method grafts the conducting polymer to the carbonaceous material. The method can further comprise metallizing the polymer-grafted carbonaceous material.
    Type: Application
    Filed: February 25, 2004
    Publication date: August 26, 2004
    Inventor: Bollepalli Srinivas
  • Metallized conducting polymer-grafted carbon material and method for making
    Publication number: 20040144961
    Abstract: A composition comprising particulate carbonaceous material and a conducting polymer containing hetero atoms. The composition can further comprise a metal. Devices comprising the composition can be constructed including supported electrocatalysts, membrane electrode assemblies, and fuel cells. A method for preparing the composition comprises oxidatively polymerizing a monomer of a conducting polymer containing hetero atoms in the presence of a carbonaceous material wherein the oxidative polymerization takes place in the presence of a metal-containing oxidizing agent. The method grafts the conducting polymer to the carbonaceous material while essentially simultaneously metallizing the composition.
    Type: Application
    Filed: September 2, 2003
    Publication date: July 29, 2004
    Inventor: Bollepalli Srinivas
  • Surface modification of carbonaceous materials with TRI substituted aminoalkyl substituents
    Publication number: 20040138503
    Abstract: The present invention relates to the surface modification of various carbonaceous materials, compounds and compositions. More specifically, the invention provides methods for introducing amide functionality on to the surface of carbonaceous materials, compounds and compositions, and similarly provides several surface modified carbonaceous materials resulting therefrom.
    Type: Application
    Filed: January 13, 2003
    Publication date: July 15, 2004
    Inventors: Bollepalli Srinivas, Jorge Ayala, Anderson O. Dotson
  • Sulfonated conducting polymer-grafted carbon material for fuel cell applications
    Publication number: 20040110051
    Abstract: A composition comprising particulate carbonaceous material and a sulfonated conducting polymer containing hetero atoms. The composition can further comprise a metal. Devices comprising the composition can be constructed including supported electrocatalysts, membrane electrode assemblies, and fuel cells. A method for preparing the composition comprises oxidatively polymerizing a monomer of a conducting polymer containing hetero atoms in the presence of a carbonaceous material and sulfonating the polymer or the monomer. The method grafts the sulfonated conducting polymer to the carbonaceous material. The method can further comprise metallizing the polymer-grafted carbonaceous material.
    Type: Application
    Filed: May 23, 2003
    Publication date: June 10, 2004
    Inventor: Bollepalli Srinivas
  • Conducting polymer-grafted carbon material for fuel cell applications
    Publication number: 20040110052
    Abstract: A composition comprising particulate carbonaceous material and a conducting polymer containing hetero atoms. The composition can further comprise a metal. Devices comprising the composition can be constructed including supported electrocatalysts, membrane electrode assemblies, and fuel cells. A method for preparing the composition comprises oxidatively polymerizing a monomer of a conducting polymer containing hetero atoms in the presence of a carbonaceous material. The method grafts the conducting polymer to the carbonaceous material. The method can further comprise metallizing the polymer-grafted carbonaceous material.
    Type: Application
    Filed: May 23, 2003
    Publication date: June 10, 2004
    Inventor: Bollepalli Srinivas
  • Proton conductive carbon material for fuel cell applications
    Publication number: 20040109816
    Abstract: The present invention provides methods for the incorporation of sulfonate functional groups onto the surface of particulate carbonaceous materials and provides several surface-modified carbonaceous material compositions resulting therefrom. The composition can further comprise a conducting polymer. The composition can further comprise a metal. Devices comprising the composition can be constructed including supported electrocatalysts, membrane electrode assemblies, and fuel cells. A method for preparing the composition comprises sulfonating particulate carbonaceous material. The method can further comprise metallizing the sulfonated carbonaceous material.
    Type: Application
    Filed: May 23, 2003
    Publication date: June 10, 2004
    Inventors: Bollepalli Srinivas, Anderson O. Dotson
  • Sulfonated carbonaceous materials
    Publication number: 20040042955
    Abstract: The present invention provides methods for the incorporation of sulfonate functional groups onto the surface of carbonaceous compounds and materials, and similarly provides several surface modified carbonaceous compounds and materials resulting therefrom.
    Type: Application
    Filed: August 28, 2002
    Publication date: March 4, 2004
    Inventor: Bollepalli Srinivas
  • Surface modification of carbonaceous materials by introduction of gamma keto carboxyl containing functional groups
    Publication number: 20040040470
    Abstract: The present invention provides a method for the preparation of carbonaceous materials comprising a plurality of gamma-keto-carboxyl containing functional groups surface bonded thereto, and further provides several surface modified carbonaceous materials resulting therefrom.
    Type: Application
    Filed: August 28, 2002
    Publication date: March 4, 2004
    Inventor: Bollepalli Srinivas
  • Trihaloperoxyacetic acid oxidation of carbonaceous materials
    Publication number: 20040043215
    Abstract: The invention provides methods for the oxidation of carbonaceous materials with a trihaloperoxyacetic acid and similarly provides several surface modified carbonaceous materials resulting therefrom.
    Type: Application
    Filed: August 28, 2002
    Publication date: March 4, 2004
    Inventors: Deepak Tandon, Bollepalli Srinivas, Kevin Hathcock