Patents by Inventor Chang L. LIU

Chang L. LIU 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).

  • Publication number: 20230225493
    Abstract: An oral care implement having a head with a plurality of cleaning elements coupled thereto and extending therefrom. In the exemplified embodiment, the cleaning elements have a plurality of bristle tufts each including a plurality of bristle filaments. In one aspect, the oral care implement may include a first bristle tuft having inner and outer filaments with the outer filaments being taller than the inner filaments and a second bristle tuft having inner and outer filaments with the outer filaments being shorter than the inner filaments. The first bristle tufts may be arranged on the head in a position so as to surround the second bristle tufts, or the second bristle tufts may be arranged on the head in a position so as to surround the first bristle tufts. Distal ends of the first and second bristle tufts may be angled.
    Type: Application
    Filed: March 13, 2023
    Publication date: July 20, 2023
    Applicant: Colgate-Palmolive Company
    Inventors: Chang L. LIU, Jiang ZHOU, Yanmei JI, Fan Gang XIE
  • Patent number: 11622618
    Abstract: An oral care implement having a head with a plurality of cleaning elements coupled thereto and extending therefrom. In the exemplified embodiment, the cleaning elements have a plurality of bristle tufts each including a plurality of bristle filaments. In one aspect, the oral care implement may include a first bristle tuft having inner and outer filaments with the outer filaments being taller than the inner filaments and a second bristle tuft having inner and outer filaments with the outer filaments being shorter than the inner filaments. In another aspect, the oral care implement may include a bristle tuft having inner and outer filaments with the inner filaments being either taller or shorter than the outer filaments, and whereby distal ends of the inner and outer filaments are angled relative to an axis of the bristle tuft.
    Type: Grant
    Filed: December 13, 2018
    Date of Patent: April 11, 2023
    Assignee: Colgate-Palmolive Company
    Inventors: Chang L. Liu, Jiang Zhou, Yanmei Ji, Fan Gang Xie
  • Publication number: 20210227964
    Abstract: An oral care implement having a head with a plurality of cleaning elements coupled thereto and extending therefrom. In the exemplified embodiment, the cleaning elements have a plurality of bristle tufts each including a plurality of bristle filaments. In one aspect, the oral care implement may include a first bristle tuft having inner and outer filaments with the outer filaments being taller than the inner filaments and a second bristle tuft having inner and outer filaments with the outer filaments being shorter than the inner filaments. In another aspect, the oral care implement may include a bristle tuft having inner and outer filaments with the inner filaments being either taller or shorter than the outer filaments, and whereby distal ends of the inner and outer filaments are angled relative to an axis of the bristle tuft.
    Type: Application
    Filed: December 13, 2018
    Publication date: July 29, 2021
    Applicant: Colgate-Palmolive Company
    Inventors: Chang L. LIU, Jiang ZHOU, Yanmei JI, Fan Gang XIE
  • Patent number: D950960
    Type: Grant
    Filed: November 12, 2019
    Date of Patent: May 10, 2022
    Assignee: Colgate-Palmolive Company
    Inventors: Daniel Wainless, Eduardo Jimenez, Chang L. Liu