Patents by Inventor Bharat Chahar

Bharat Chahar 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).

  • Carbon-coated silicon particle powders as the anode material for lithium ion batteries and the method of making the same
    Patent number: 7618678
    Abstract: A process for the production of coated silicon/carbon particles comprising: providing a carbon residue forming material; providing silicon particles; coating said silicon particles with said carbon residue forming material to form coated silicon particles; providing particles of a carbonaceous material; coating said particles of carbonaceous material with said carbon residue forming material to form coated carbonaceous particles; embedding said coated silicon particles onto said coated carbonaceous particles to form silicon/carbon composite particles; coating said silicon/carbon composite particles with said carbon residue forming material to form coated silicon/carbon composite particles; and stabilizing the coated composite particles by subjecting said coated composite particles to an oxidation reaction. The coated composite particles will have a substantially smooth coating. The particles may be coated with multiple layers of carbon residue forming material.
    Type: Grant
    Filed: December 19, 2003
    Date of Patent: November 17, 2009
    Assignee: ConocoPhillips Company
    Inventors: Zhenhua Mao, Bharat Chahar
  • Carbon-Coated Silicon Particle Powder as the Anode Material for Lithium Ion Batteries and Method of Making the Same
    Publication number: 20090130562
    Abstract: A process for the production of coated silicon/carbon particles comprising: providing a carbon residue forming material; providing silicon particles; coating said silicon particles with said carbon residue forming material to form coated silicon particles; providing particles of a carbonaceous material; coating said particles of carbonaceous material with said carbon residue forming material to form coated carbonaceous particles; embedding said coated silicon particles onto said coated carbonaceous particles to form silicon/carbon composite particles; coating said silicon/carbon composite particles with said carbon residue forming material to form coated silicon/carbon composite particles; and stabilizing the coated composite particles by subjecting said coated composite particles to an oxidation reaction. The coated composite particles will have a substantially smooth coating.
    Type: Application
    Filed: December 8, 2008
    Publication date: May 21, 2009
    Applicant: CONOCOPHILLIPS COMPANY
    Inventors: Zhenhua Mao, Bharat Chahar
  • Carbon-coated silicon particle power as the anode material for lithium batteries and the method of making the same
    Publication number: 20050136330
    Abstract: A process for the production of coated silicon/carbon particles comprising: providing a carbon residue forming material; providing silicon particles; coating said silicon particles with said carbon residue forming material to form coated silicon particles; providing particles of a carbonaceous material; coating said particles of carbonaceous material with said carbon residue forming material to form coated carbonaceous particles; embedding said coated silicon particles onto said coated carbonaceous particles to form silicon/carbon composite particles; coating said silicon/carbon composite particles with said carbon residue forming material to form coated silicon/carbon composite particles; and stabilizing the coated composite particles by subjecting said coated composite particles to an oxidation reaction. The coated composite particles will have a substantially smooth coating.
    Type: Application
    Filed: December 19, 2003
    Publication date: June 23, 2005
    Inventors: Zhenhua Mao, Bharat Chahar