Patents by Inventor Roland Ma

Roland Ma 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: 11274181
    Abstract: Provided herein are polyimide dispersants, as well as methods for producing polyimide dispersants. The polyimides can be defined by the formula below wherein A, individually for each occurrence, represents a cyclic diimide moiety represented by the structure below where B represents a cyclic moiety substituted with a first cyclic imide group and a second cyclic imide group; Y, individually for each occurrence, represents a bivalent linking group; L, individually for each occurrence, is absent or represents a cyclic imide group; R, individually for each occurrence, represents a polymeric tail; and n is an integer from 1 to 20.
    Type: Grant
    Filed: September 18, 2018
    Date of Patent: March 15, 2022
    Assignee: CHEVRON ORONITE COMPANY LLC
    Inventors: David Morgan, Roland Ma, Georgeta Masson
  • Publication number: 20190085129
    Abstract: Provided herein are polyimide dispersants, as well as methods for producing polyimide dispersants. The polyimides can be defined by the formula below wherein A, individually for each occurrence, represents a cyclic diimide moiety represented by the structure below where B represents a cyclic moiety substituted with a first cyclic imide group and a second cyclic imide group; Y, individually for each occurrence, represents a bivalent linking group; L, individually for each occurrence, is absent or represents a cyclic imide group; R, individually for each occurrence, represents a polymeric tail; and n is an integer from 1 to 20.
    Type: Application
    Filed: September 18, 2018
    Publication date: March 21, 2019
    Inventors: David Morgan, Roland Ma, Georgeta Masson