Patents by Inventor Guofeng QIU

Guofeng QIU 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).

  • Biological desulfurizer for removing organic sulfur in fracturing flowback fluid and application thereof
    Patent number: 11926544
    Abstract: The invention discloses a biological desulfurizer for removing organic sulfur in fracturing flowback fluid and application thereof. The biological desulfurizer includes a compound with a triazine structure formed by modifying chitosan with aldehydes and inorganic salts. The triazine structure has a good removal effect on hydrogen sulfide and organic sulfur such as mercaptan and sulfide. The biological desulfurizer of the invention has a sulfur capacity of up to 250 g/kg and a desulfurization efficiency of over 95% in 15 min. It can effectively remove the stink of sulfur-containing working water, improve the working environment of the well site, and reduce the impact of sulfur compounds on the atmospheric environment during the development of oil and gas fields.
    Type: Grant
    Filed: October 16, 2023
    Date of Patent: March 12, 2024
    Assignees: CHINA PETROLEUM & CHEMICAL CORPORATION, CHINA PETROLEUM & CHEMICAL CO., LTD. OF NORTH BRANCH
    Inventors: Xiaoqing Qiu, Xiang Wang, Guisheng Wang, Guofeng Li, Jiawei Zhang, Lei Song, Xia Wang, Qianli Xu, Puyan Hou
  • Initiator composition for curing resin
    Patent number: 9453085
    Abstract: An initiator composition, including at least two compounds represented by the chemical formula R—CO—O—O—CO—R and a compound represented by R1—O—O—R2, where R represents a C2-C12 alkyl or a C6-C10 aryl or substituted aryl, and R1 and R2 independently, at each occurrence, represent a C1-C10 alkyl or a C6-C10 aryl.
    Type: Grant
    Filed: September 21, 2014
    Date of Patent: September 27, 2016
    Assignee: WUHAN KEDA MARBLE PROTECTIVE MATERIALS CO., LTD.
    Inventors: Kunwen Du, Kunwu Du, Guofeng Qiu, Panfeng Mao, Liya Wang
  • Initiator composition, unsaturated polyester resin composition comprising same, and method for curing resin
    Patent number: 9334362
    Abstract: An initiator composition, including: at least two compounds represented by the chemical formula of R—CO—O—O—CO—R and a compound represented by the chemical formula of R1—CO—O—O—R2, where R represents a C2-C12 alkyl or a C6-C10 aryl or substituted aryl, R1 represents a C1-C10 alkyl or a C6-C10 aryl, and R2 represents a C1-C10 alkyl.
    Type: Grant
    Filed: September 24, 2014
    Date of Patent: May 10, 2016
    Assignee: WUHAN KEDA MARBLE PROTECTIVE MATERIALS CO., LTD.
    Inventors: Kunwen Du, Kunwu Du, Guofeng Qiu, Panfeng Mao, Liya Wang
  • INITIATOR COMPOSITION FOR CURING RESIN
    Publication number: 20150008365
    Abstract: An initiator composition, including at least two compounds represented by the chemical formula R—CO—O—O—CO—R and a compound represented by R1—O—O—R2, where R represents a C2-C12 alkyl or a C6-C10 aryl or substituted aryl, and R1 and R2 independently, at each occurrence, represent a C1-C10 alkyl or a C6-C10 aryl.
    Type: Application
    Filed: September 21, 2014
    Publication date: January 8, 2015
    Inventors: Kunwen DU, Kunwu DU, Guofeng QIU, Panfeng MAO, Liya WANG
  • INITIATOR COMPOSITION, UNSATURATED POLYESTER RESIN COMPOSITION COMPRISING SAME, AND METHOD FOR CURING RESIN
    Publication number: 20150011713
    Abstract: An initiator composition, including: at least two compounds represented by the chemical formula of R—CO—O—O—CO—R and a compound represented by the chemical formula of R1—CO—O—O—R2, where R represents a C2-C12 alkyl or a C6-C10 aryl or substituted aryl, R1 represents a C1-C10 alkyl or a C6-C10 aryl, and R2 represents a C1-C10 alkyl.
    Type: Application
    Filed: September 24, 2014
    Publication date: January 8, 2015
    Inventors: Kunwen DU, Kunwu DU, Guofeng QIU, Panfeng MAO, Liya WANG