Patents by Inventor Keqing Li

Keqing Li 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: 20240208861
    Abstract: A low-cost four-element system cementitious material, a preparation method and an application thereof are provided by the present disclosure, and the cementitious material is used in the fields of mine cementing filling and building materials. The four-element system cementitious material includes the following raw materials in percentage by mass: 20-60% of water-quenched blast furnace slag, 10-40% of waste incineration bottom ash, 20% of pretreated waste incineration fly ash and the balance of desulfurization gypsum. The low-cost four-element system cementitious material is used to replace cement to prepare mine cementing filling materials, and is also used to prepare concrete materials for construction industry.
    Type: Application
    Filed: December 20, 2023
    Publication date: June 27, 2024
    Inventors: Siqi ZHANG, Tong ZHAO, Huifen YANG, Wen NI, Zeping WU, Yue LI, Jia LI, Keqing LI, Pingfeng FU, Yunyun LI, Xiang CHEN, Yuhang LIU, Dongshang GUAN, Jiajia WANG, Qiwei SUN
  • Patent number: D763719
    Type: Grant
    Filed: October 2, 2015
    Date of Patent: August 16, 2016
    Assignee: Fitbit, Inc.
    Inventors: Jens Mitchell Nielsen, Mark Manuel Martinez, Maxwell W. Davis, Keqing Li, Brad Daniel Brinson, Gad Amit, Daniel J. Clifton, Erik Keith Askin, David Chia-wen Lean
  • Patent number: D777590
    Type: Grant
    Filed: August 27, 2015
    Date of Patent: January 31, 2017
    Assignee: FITBIT, INC.
    Inventors: Jens Mitchell Nielsen, Mark Manuel Martinez, Maxwell W. Davis, Keqing Li, Brad Daniel Brinson, Keeline Burdick Wilcox, Gad Amit, Daniel J. Clifton, Erik Keith Askin, David Chia-wen Lean
  • Patent number: D790994
    Type: Grant
    Filed: June 29, 2016
    Date of Patent: July 4, 2017
    Assignee: Fitbit, Inc.
    Inventors: Jens Mitchell Nielsen, Mark Manuel Martinez, Maxwell W. Davis, Keqing Li, Brad Daniel Brinson, Gad Amit, Daniel Joseph Clifton, Erik Keith Askin, David Chia-wen Lean
  • Patent number: D806599
    Type: Grant
    Filed: October 2, 2015
    Date of Patent: January 2, 2018
    Assignee: Fitbit, Inc.
    Inventors: Jens Mitchell Nielsen, Mark Manuel Martinez, Keqing Li, Brad Daniel Brinson, Gad Amit, Daniel J. Clifton, Erik Keith Askin
  • Patent number: D813695
    Type: Grant
    Filed: November 29, 2016
    Date of Patent: March 27, 2018
    Assignee: Fitbit, Inc.
    Inventors: Jens Mitchell Nielsen, Mark Manuel Martinez, Maxwell W. Davis, Keqing Li, Brad Daniel Brinson, Keeline Burdick Wilcox, Gad Amit, Daniel Joseph Clifton, Erik Keith Askin, David Chia-wen Lean