Patents by Inventor Yiming Mao

Yiming Mao 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).

  • Method for cleaning phosgene-conducting apparatuses
    Patent number: 11020720
    Abstract: The invention relates to a method for cleaning a phosgene-conducting apparatus by pressurization with ammonia gas to constant pressure. In this way, phosgene residues in the apparatus to be cleaned are decomposed effectively.
    Type: Grant
    Filed: September 3, 2018
    Date of Patent: June 1, 2021
    Assignee: Covestro Deutschland AG
    Inventors: Wolfgang Taube, Zhangyong Ming, Yiming Mao, Yuguo Gai
  • METHOD FOR CLEANING PHOSGENE-CONDUCTING APPARATUSES
    Publication number: 20200222871
    Abstract: The invention relates to a method for cleaning a phosgene-conducting apparatus by pressurization with ammonia gas to constant pressure. In this way, phosgene residues in the apparatus to be cleaned are decomposed effectively.
    Type: Application
    Filed: September 3, 2018
    Publication date: July 16, 2020
    Inventors: Wolfgang Taube, Zhangyong Ming, Yiming Mao, Yuguo Gai