Patents by Inventor Zhengtao Liu

Zhengtao 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).

  • Methods for preparing trimanganese tetroxide with low bet specific surface area, methods for controlling particle size of trimanganese tetroxide and trimanganese tetroxide product
    Patent number: 9352976
    Abstract: The present invention provides methods for preparing trimanganese tetroxide with low BET specific surface area and methods for controlling particle size of trimanganese tetroxide and trimanganese tetroxide product.
    Type: Grant
    Filed: October 14, 2015
    Date of Patent: May 31, 2016
    Assignee: GUIZHOU REDSTAR DEVELOPING CO., LTD.
    Inventors: Zhiguang Jiang, Dong Hua, Zhengtao Liu, Kaiwen Zeng
  • METHODS FOR PREPARING TRIMANGANESE TETROXIDE WITH LOW BET SPECIFIC SURFACE AREA, METHODS FOR CONTROLLING PARTICLE SIZE OF TRIMANGANESE TETROXIDE AND TRIMANGANESE TETROXIDE PRODUCT
    Publication number: 20160031718
    Abstract: The present invention provides methods for preparing trimanganese tetroxide with low BET specific surface area and methods for controlling particle size of trimanganese tetroxide and trimanganese tetroxide product.
    Type: Application
    Filed: October 14, 2015
    Publication date: February 4, 2016
    Inventors: Zhiguang JIANG, Dong HUA, Zhengtao LIU, Kaiwen ZENG
  • Methods for preparing trimanganese tetroxide with low BET specific surface area, methods for controlling particle size of trimanganese tetroxide and trimanganese tetroxide product
    Patent number: 9163328
    Abstract: The present invention provides methods for preparing trimanganese tetroxide with low BET specific surface area and methods for controlling particle size of trimanganese tetroxide and trimanganese tetroxide product.
    Type: Grant
    Filed: June 19, 2013
    Date of Patent: October 20, 2015
    Assignee: Guizhou Redstar Developing Co., Ltd.
    Inventors: Zhiguang Jiang, Dong Hua, Zhengtao Liu, Kaiwen Zeng
  • METHODS FOR PREPARING TRIMANGANESE TETROXIDE WITH LOW BET SPECIFIC SURFACE AREA, METHODS FOR CONTROLLING PARTICLE SIZE OF TRIMANGANESE TETROXIDE AND TRIMANGANESE TETROXIDE PRODUCT
    Publication number: 20130344333
    Abstract: The present invention provides methods for preparing trimanganese tetroxide with low BET specific surface area and methods for controlling particle size of trimanganese tetroxide and trimanganese tetroxide product.
    Type: Application
    Filed: June 19, 2013
    Publication date: December 26, 2013
    Inventors: Zhiguang Jiang, Dong Hua, Zhengtao Liu, Kaiwen Zeng
  • Titania composite and preparing method thereof
    Patent number: 8221834
    Abstract: A titania composite and a preparing method thereof are provided. The titania composite comprises an inner core and a coating film layer, wherein the inner core is a barium sulfate crystal and/or a strontitum sulfate crystal with subsphaeroidal shape, having a particle size of less than 1 ?m and whiteness of more than 98%, and the coating film layer is nano rutile titania. The preparing method thereof comprises the following steps: (a) preparing barium sulfate or strontium sulfate; (b) coating treatment; (c) subjecting the titania composite to a high-temperature heat treatment; and (d) subjecting the titania composite to a post treatment. The subsphaeroidal titania composite is obtained by chemically synthesizing a subsphaeroidal submicron barium sulfide or strontium sulfide, and then hydrolyzing and coating thereon to form a coating film layer of titania to make titania grow evenly.
    Type: Grant
    Filed: December 30, 2009
    Date of Patent: July 17, 2012
    Assignee: Chongqing Kechang Technology Co., Ltd.
    Inventors: Dong Hua, Zhengtao Liu
  • TITANIA COMPOSITE AND PREPARING METHOD THEREOF
    Publication number: 20110253012
    Abstract: A titania composite and a preparing method thereof are provided. The titania composite comprises an inner core and a coating film layer, wherein the inner core is a barium sulfate crystal and/or a strontitum sulfate crystal with subsphaeroidal shape, having a particle size of less than 1 ?m and whiteness of more than 98%, and the coating film layer is nano rutile titania. The preparing method thereof comprises the following steps: (a) preparing barium sulfate or strontium sulfate; (b) coating treatment; (c) subjecting the titania composite to a high-temperature heat treatment; and (d) subjecting the titania composite to a post treatment. The subsphaeroidal titania composite is obtained by chemically synthesizing a subsphaeroidal submicron barium sulfide or strontium sulfide, and then hydrolyzing and coating thereon to form a coating film layer of titania to make titania grow evenly.
    Type: Application
    Filed: December 30, 2009
    Publication date: October 20, 2011
    Applicant: CHONGQING KECHANG TECHNOLOGY CO., LTD.
    Inventors: Dong Hua, Zhengtao Liu