Patents by Inventor Michal Gulas

Michal Gulas 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 oxide/graphite composite particles, methods of making, and applications of the same
    Patent number: 11814296
    Abstract: The present disclosure relates to novel particulate composite materials comprising a graphitic core particle associated with SiOx nanoparticles (0.2?X?1.8), and coated by a layer of non-graphitic carbon, e.g., pyrolytic carbon deposited by chemical vapor deposition (CVD). Also included are processes for making such particles as well as uses and downstream products for the novel composite material, in particular as an active material in negative electrodes in Li-ion batteries.
    Type: Grant
    Filed: July 20, 2018
    Date of Patent: November 14, 2023
    Assignee: Imerys Graphite & Carbon Switzerland Ltd.
    Inventors: Michael Spahr, Michal Gulas, Tatsuo Umeno, Hiroyuki Taki, Pascual Perez
  • Hydrophilic surface-modified carbonaceous particulate material
    Patent number: 10707487
    Abstract: The present disclosure relates to a novel surface-modified carbonaceous particulate material having a hydrophilic non-graphitic carbon coating. The material can for example be produced by CVD-coating of a carbonaceous particulate material such as graphite followed by an oxidation treatment under defined conditions. The resulting material exhibits a more hydrophilic surface compared to an unmodified CVD-coated carbon material, which is desirable in many applications, such as when used as an active material in the negative electrode of lithium ion batteries or in a polymer composite material.
    Type: Grant
    Filed: July 15, 2015
    Date of Patent: July 7, 2020
    Assignee: Imerys Graphite & Carbon Switzerland Ltd.
    Inventors: Michal Gulas, Pirmin Ulmann, Simone Zürcher, Michael Spahr
  • Surface-modified low surface area graphite, processes for making it, and applications of the same
    Patent number: 10305107
    Abstract: Surface-modified, low surface area synthetic graphite may have a BET surface from 1.0 to 4.0 m2/g and a crystallite size Lc to crystallite size La ratio of greater than 1. Processes for modifying the surface of low surface area synthetic graphite may result in surface-modified, low surface area synthetic graphite have a BET surface from 1.0 to 4.0 m2/g and a crystallite size Lc to crystallite size La ratio of greater than 1. Such synthetic graphite may have many uses, including for example, as a negative electrode material in lithium-ion batteries.
    Type: Grant
    Filed: March 15, 2013
    Date of Patent: May 28, 2019
    Assignee: Imerys Graphite & Carbon Switzerland Ltd.
    Inventors: Michael E. Spahr, Pirmin A. Ulmann, Simone Zurcher, Michal Gulas, Flavio Mornaghini
  • SURFACE-MODIFIED LOW SURFACE AREA GRAPHITE, PROCESSES FOR MAKING IT, AND APPLICATIONS OF THE SAME
    Publication number: 20150079477
    Abstract: Surface-modified, low surface area synthetic graphite may have a BET surface from 1.0 to 4.0 m2/g and a crystallite size Lc to crystallite size La ratio of greater than 1. Processes for modifying the surface of low surface area synthetic graphite may result in surface-modified, low surface area synthetic graphite have a BET surface from 1.0 to 4.0 m2/g and a crystallite size Lc to crystallite size La ratio of greater than 1. Such synthetic graphite may have many uses, including for example, as a negative electrode material in lithium-ion batteries.
    Type: Application
    Filed: March 15, 2013
    Publication date: March 19, 2015
    Inventors: Michael E. Spahr, Pirmin A. Ulmann, Simone Zürcher, Michal Gulas, Flavio Mornaghini