Patents by Inventor Ruchira R. Dharmasena

Ruchira R. Dharmasena 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).

  • Patent number: 11424509
    Abstract: A method for coating a separator for a battery includes creating an electrostatic field and disposing a substrate material within the electrostatic field. The method further includes applying a coating material to the substrate material in a presence of the electrostatic field and drying the coating material upon the substrate material.
    Type: Grant
    Filed: February 10, 2021
    Date of Patent: August 23, 2022
    Assignee: GM Global Technology Operations LLC
    Inventors: Ruchira R. Dharmasena, Shuru Chen, Fang Dai, Mei Cai
  • Publication number: 20220255187
    Abstract: A method for coating a separator for a battery includes creating an electrostatic field and disposing a substrate material within the electrostatic field. The method further includes applying a coating material to the substrate material in a presence of the electrostatic field and drying the coating material upon the substrate material.
    Type: Application
    Filed: February 10, 2021
    Publication date: August 11, 2022
    Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC
    Inventors: Ruchira R. Dharmasena, Shuru Chen, Fang Dai, Mei Cai
  • Publication number: 20210184200
    Abstract: A method of applying a homogenous film coating to a constituent particle of component includes setting up a target element in a sputtering chamber. The method also includes arranging a receptacle in the sputtering chamber. The method additionally includes arranging the constituent particle on the receptacle. The method also includes bombarding the target element via energetic particles to eject material from the target element and deposit the material onto the constituent particle. The method further includes agitating the receptacle during the bombarding to apply the material to the constituent particle as the homogenous film coating. The method may be used to apply a homogenous thin film coating to a sulfur-infused constituent particle for a sulfur cathode in a lithium-sulfur battery.
    Type: Application
    Filed: December 11, 2019
    Publication date: June 17, 2021
    Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC
    Inventors: Ruchira R. Dharmasena, Shuru Chen, Fang Dai, Mei Cai