Patents by Inventor Le Zhen

Le Zhen 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).

  • Low temperature pyrolysis method of caking middling coal
    Patent number: 11981867
    Abstract: The present disclosure relates to the technical field of pyrolysis and improvement of caking middling coals, in particular to a low temperature pyrolysis method of a caking middling coal. The present disclosure provides a low temperature pyrolysis method of a caking middling coal, including the following steps: conveying the caking middling coal into a pyrolysis reactor through a top of the pyrolysis reactor; dividing a reaction chamber of the pyrolysis reactor into a drying section, a softening section, a melting and depolymerization section, a solidification section, and a cooling section by means of multi-channel gas distribution; and conducting zoned temperature control-based pyrolysis to obtain semi-coke at a bottom of the reactor as well as tar and coal gas at the top of the reactor. The pyrolysis method can well avoid caking and swelling of the caking middling coal during pyrolysis.
    Type: Grant
    Filed: May 16, 2023
    Date of Patent: May 14, 2024
    Assignee: Yan'an University
    Inventors: Zhuangzhuang Zhang, Feng Fu, Zhiping Mi, Yanzhong Zhen, Jie Gu, Xiaoxia Yang, Le Wang, Xiaoli Qiu
  • LOW TEMPERATURE PYROLYSIS METHOD OF CAKING MIDDLING COAL
    Publication number: 20240093095
    Abstract: The present disclosure relates to the technical field of pyrolysis and improvement of caking middling coals, in particular to a low temperature pyrolysis method of a caking middling coal. The present disclosure provides a low temperature pyrolysis method of a caking middling coal, including the following steps: conveying the caking middling coal into a pyrolysis reactor through a top of the pyrolysis reactor; dividing a reaction chamber of the pyrolysis reactor into a drying section, a softening section, a melting and depolymerization section, a solidification section, and a cooling section by means of multi-channel gas distribution; and conducting zoned temperature control-based pyrolysis to obtain semi-coke at a bottom of the reactor as well as tar and coal gas at the top of the reactor. The pyrolysis method can well avoid caking and swelling of the caking middling coal during pyrolysis.
    Type: Application
    Filed: May 16, 2023
    Publication date: March 21, 2024
    Inventors: Zhuangzhuang ZHANG, Feng FU, Zhiping MI, Yanzhong ZHEN, Jie GU, Xiaoxia YANG, Le WANG, Xiaoli QIU
  • PRO-HEALING ELASTIC ANGIOGENIC MICROPOROUS VASCULAR GRAFT
    Publication number: 20200261207
    Abstract: Synthetic polymeric vascular grafts that promote endothelial healing and methods of their preparation and use are provided.
    Type: Application
    Filed: April 28, 2020
    Publication date: August 20, 2020
    Applicant: University of Washington
    Inventors: Buddy D. Ratner, Le Zhen, Felix Simonovsky, Jonathan Himmelfarb
  • Pro-healing elastic angiogenic microporous vascular graft
    Patent number: 10667897
    Abstract: Synthetic polymeric vascular grafts that promote endothelial healing and methods of their preparation and use are provided.
    Type: Grant
    Filed: January 24, 2018
    Date of Patent: June 2, 2020
    Assignee: University of Washington
    Inventors: Buddy D. Ratner, Le Zhen, Felix Simonovsky, Jonathan Himmelfarb
  • PRO-HEALING ELASTIC ANGIOGENIC MICROPOROUS VASCULAR GRAFT
    Publication number: 20180206971
    Abstract: Synthetic polymeric vascular grafts that promote endothelial healing and methods of their preparation and use are provided.
    Type: Application
    Filed: January 24, 2018
    Publication date: July 26, 2018
    Applicant: University of Washington
    Inventors: Buddy D. Ratner, Le Zhen, Felix Simonovsky, Jonathan Himmelfarb