Patents by Inventor Xiaohua Du

Xiaohua Du 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: 11512057
    Abstract: The present invention discloses unsaturated hydrocarbon pyrimidine thioether compounds of formula (I) and preparation method and application thereof, the compounds of formula (I) exhibit high insecticidal and acaricidal activity against adults, larvae and eggs of harmful mites and insects in the agriculture, civil use and animal technology fields, meanwhile, the compounds also exhibit good bactericidal activity, and can be widely applied as an insecticide, an acaricide and/or a bactericide in agriculture or other fields
    Type: Grant
    Filed: November 5, 2018
    Date of Patent: November 29, 2022
    Assignee: ZHEJIANG UNIVERSITY OF TECHNOLOGY
    Inventors: Xiaohua Du, Shulin Hao
  • Publication number: 20200207723
    Abstract: The present invention discloses unsaturated hydrocarbon pyrimidine thioether compounds of formula (I) and preparation method and application thereof, the compounds of formula (I) exhibit high insecticidal and acaricidal activity against adults, larvae and eggs of harmful mites and insects in the agriculture, civil use and animal technology fields, meanwhile, the compounds also exhibit good bactericidal activity, and can be widely applied as an insecticide, an acaricide and/or a bactericide in agriculture or other fields
    Type: Application
    Filed: November 5, 2018
    Publication date: July 2, 2020
    Inventors: Xiaohua DU, Shulin HAO
  • Publication number: 20190284202
    Abstract: The invention relates to a process for the manufacture of diazepine derivatives as defined in the description and in the claims.
    Type: Application
    Filed: June 7, 2019
    Publication date: September 19, 2019
    Applicant: Hoffmann-La Roche Inc.
    Inventors: Fritz Bliss, Xiaohua Du, Dawei He, Stefan Hildbrand, Paul Spurr, Wenfa Ye, Jianbing Zheng
  • Patent number: 9884823
    Abstract: The present invention discloses an oxime ether acetate compound containing a phenylpyridine moiety of formula (I), whose preparation method is as follows: (1) mixing a compound of formula (IV), a compound of formula (V), an alkaline substance A, a palladium catalyst and a solvent A; subjecting the mixture to a reaction at the temperature ranging from ?10° C. to the reflux temperature for 0.5-20 hours to obtain a reaction solution A; post-treating the solution A to obtain a compound of formula (II); (2) mixing the compound of formula (II), an alkaline substance B, a phase transfer catalyst and a solvent B; subjecting the mixture to a reaction at the temperature ranging from ?10° C. to the reflux temperature for 0.1-2 hours; then adding a compound of formula (III), continuing to react at the temperature ranging from ?10° C. to the reflux temperature for 0.5-20 hours to obtain a reaction solution B; and post-treating the solution B to obtain the compound of formula (I).
    Type: Grant
    Filed: February 13, 2015
    Date of Patent: February 6, 2018
    Assignee: ZHEJIANG UNIVERSITY OF TECHNOLOGY
    Inventors: Xiaohua Du, Dajie Mao, Zhenyuan Xu
  • Publication number: 20170001961
    Abstract: The present invention discloses an oxime ether acetate compound containing a phenylpyridine moiety of formula (I), whose preparation method is as follows: (1) mixing a compound of formula (IV), a compound of formula (V), an alkaline substance A, a palladium catalyst and a solvent A; subjecting the mixture to a reaction at the temperature ranging from ?10° C. to the reflux temperature for 0.5-20 hours to obtain a reaction solution A; post-treating the solution A to obtain a compound of formula (II); (2) mixing the compound of formula (II), an alkaline substance B, a phase transfer catalyst and a solvent B; subjecting the mixture to a reaction at the temperature ranging from ?10° C. to the reflux temperature for 0.1-2 hours; then adding a compound of formula (III), continuing to react at the temperature ranging from ?10° C. to the reflux temperature for 0.5-20 hours to obtain a reaction solution B; and post-treating the solution B to obtain the compound of formula (I).
    Type: Application
    Filed: February 13, 2015
    Publication date: January 5, 2017
    Applicant: ZHEJIANG UNIVERSITY OF TECHNOLOGY
    Inventors: XIAOHUA DU, DAJIE MAO, ZHENYUAN XU
  • Patent number: 8506827
    Abstract: Methods for forming a metal grating include providing a first grating including a plurality of grating lines formed from a dielectric material, each grating having a pair of sidewalls, facing sidewalls of adjacent grating lines being separated by corresponding trenches, the grating lines and trenches forming a grating surface; forming a layer of a metal on the grating surface, where the metal layer has a constant thickness and conforms to the grating surface; and removing portions of the metal layer between sidewalls of adjacent grating lines of the first grating to form a metal grating having grating lines formed from the metal, the grating lines of the metal grating corresponding to the portions of the metal layer adjacent the sidewalls of the grating lines of the first grating. The metal grating has a pitch of 200 nm or less, a depth of 50 nm or more, and the grating lines of the metal grating have an aspect ratio of 10-to-1 or more.
    Type: Grant
    Filed: September 21, 2009
    Date of Patent: August 13, 2013
    Assignee: Polarization Solutions, LLC
    Inventors: Qihong Wu, Sheng Liu, Xu Zhang, Shiaw-wen Tai, Xiaohua Du, Thomas Tombler
  • Publication number: 20100072170
    Abstract: Methods for forming a metal grating include providing a first grating including a plurality of grating lines formed from a dielectric material, each grating having a pair of sidewalls, facing sidewalls of adjacent grating lines being separated by corresponding trenches, the grating lines and trenches forming a grating surface; forming a layer of a metal on the grating surface, where the metal layer has a constant thickness and conforms to the grating surface; and removing portions of the metal layer between sidewalls of adjacent grating lines of the first grating to form a metal grating having grating lines formed from the metal, the grating lines of the metal grating corresponding to the portions of the metal layer adjacent the sidewalls of the grating lines of the first grating. The metal grating has a pitch of 200 nm or less, a depth of 50 nm or more, and the grating lines of the metal grating have an aspect ratio of 10-to-1 or more.
    Type: Application
    Filed: September 21, 2009
    Publication date: March 25, 2010
    Inventors: Qihong Wu, Sheng Liu, Xu Zhang, Shiaw-wen Tai, Xiaohua Du, Thomas Tombler