Patents by Inventor Renjian Wei

Renjian Wei 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: 20250223148
    Abstract: The present invention discloses an electric jar opener comprising a housing; a first clamping jaw group; a second clamping jaw group; a movement mechanism. The first clamping jaw group comprises two oppositely-disposed mutually facing first clamping jaws for clamping a can body, the second clamping jaw group comprises two oppositely-disposed mutually facing second clamping jaws for clamping and screwing a lid; the movement mechanism comprises a motor and a differential with two outputs; a first output of the differential is in transmission connection to the first clamping jaws and a second output thereof is in transmission connection to the second clamping jaws. By use of the differential, the first output of the differential is in transmission connection to the first clamping jaws and the second output thereof is in transmission connection to the second clamping jaws, so that the whole machine operates in a balanced and stable manner.
    Type: Application
    Filed: March 11, 2024
    Publication date: July 10, 2025
    Inventors: Renjian Wei, Lihua Zhou
  • Patent number: 9469722
    Abstract: A metal cyanide complex catalyst and its preparation and application are disclosed. The formula of this catalyst is M1a[M2(CN)bL1c]d(X)m(L2)n.xSu.yL3.zH2O and its preparation method comprises: (A) adjusting pH of a mixed solution I? of L3, M3e[M2(CN)bL1c]f, de-ionized water I, alcohol and/or ether solvent to less than 7.0, and adding it into a mixed solution II? of M1(X)g salt, Su or Su precursor, de-ionized water II, stirring for reaction under 20° C.-120° C. for 0.5-200 hours, separating and drying to obtain a solid product; and (B) repeatedly dispersing the solid into an anhydrous organic solvent containing L2 to form a slurry, distilling, separating and drying to obtain the metal cyanide complex catalyst. The catalyst is useful in preparing polyethers, polycarbonates and polyesters by homopolymerization of epoxides, or copolymerization of epoxides with carbon dioxide or anhydrides.
    Type: Grant
    Filed: September 12, 2014
    Date of Patent: October 18, 2016
    Assignee: ZHEJIANG UNIVERSITY
    Inventors: Xinghong Zhang, Guorong Qi, Binyang Du, Renjian Wei, Xueke Sun
  • Publication number: 20150018501
    Abstract: A metal cyanide complex catalyst and its preparation and application are disclosed. The formula of this catalyst is M1a[M2(CN)bL1c]d(X)m(L2)n.xSu.yL3.zH2O and its preparation method comprises: (A) adjusting pH of a mixed solution I? of L3, M3e[M2(CN)bL1c]f, de-ionized water I, alcohol and/or ether solvent to less than 7.0, and adding it into a mixed solution II? of M1(X)g salt, Su or Su precursor, de-ionized water II, stirring for reaction under 20° C.-120° C. for 0.5-200 hours, separating and drying to obtain a solid product; and (B) repeatedly dispersing the solid into an anhydrous organic solvent containing L2 to form a slurry, distilling, separating and drying to obtain the metal cyanide complex catalyst. The catalyst is useful in preparing polyethers, polycarbonates and polyesters by homopolymerization of epoxides, or copolymerization of epoxides with carbon dioxide or anhydrides.
    Type: Application
    Filed: September 12, 2014
    Publication date: January 15, 2015
    Inventors: Xinghong Zhang, Guorong Qi, Binyang Du, Renjian Wei, Xueke Sun
  • Patent number: 8859452
    Abstract: A metal cyanide complex catalyst and its preparation and application are disclosed. The formula of this catalyst is M1a[M2(CN)bL1c]d(X)m(L2)n.xSu.yL3.zH2O and its preparation method comprises: (A) adjusting pH of a mixed solution I? of L3, M3e[M2(CN)bL1c]f, de-ionized water I, alcohol and/or ether solvent to less than 7.0, and adding it into a mixed solution II? of M1(X)g salt, Su or Su precursor, de-ionized water II, stirring for reaction under 20° C.-120° C. for 0.5-200 hours, separating and drying to obtain a solid product; and (B) repeatedly dispersing the solid into an anhydrous organic solvent containing L2 to form a slurry, distilling, separating and drying to obtain the metal cyanide complex catalyst. The catalyst is useful in preparing polyethers, polycarbonates and polyesters by homopolymerization of epoxides, or copolymerization of epoxides with carbon dioxide or anhydrides.
    Type: Grant
    Filed: December 13, 2010
    Date of Patent: October 14, 2014
    Assignee: Zhejiang University
    Inventors: Xinghong Zhang, Guorong Qi, Binyang Du, Renjian Wei, Xueke Sun
  • Publication number: 20120172566
    Abstract: A metal cyanide complex catalyst and its preparation and application are disclosed. The formula of this catalyst is M1a[M2(CN)bL1c]d(X)m(L2)n·xSu·yL3·zH2O and its preparation method comprises: (A) adjusting pH of a mixed solution I? of L3, M3e[M2(CN)bL1c]f, de-ionized water I, alcohol and/or ether solvent to less than 7.0, and adding it into a mixed solution II? of M1(X)g salt, Su or Su precursor, de-ionized water II, stirring for reaction under 20° C.-120° C. for 0.5-200 hours, separating and drying to obtain a solid product; and (B) repeatedly dispersing the solid into an anhydrous organic solvent containing L2 to form a slurry, distilling, separating and drying to obtain the metal cyanide complex catalyst. The catalyst is useful in preparing polyethers, polycarbonates and polyesters by homopolymerization of epoxides, or copolymerization of epoxides with carbon dioxide or anhydrides.
    Type: Application
    Filed: December 13, 2010
    Publication date: July 5, 2012
    Applicant: ZHEJIANG University
    Inventors: Xinghong Zhang, Guorong Qi, Binyang Du, Renjian Wei, Xueke Sun