Patents by Inventor Zhenggang Yu

Zhenggang Yu 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).

  • Process for treatment of wastewater
    Patent number: 11148961
    Abstract: A process for the treatment of acidic wastewater which comprises hydrochloric acid, nitric acid as an optional component, 0.1 to 30 wt.-% of one or more dissolved metals selected from the group consisting of aluminum and heavy metals other than precious metals, and 10 to 500 wt.
    Type: Grant
    Filed: March 9, 2017
    Date of Patent: October 19, 2021
    Assignees: HERAEUS DEUTSCHLAND GMBH & CO. KG, HERAEUS PRECIOUS METAL TECHNOLOGY (CHINA) CO., LTD., HERAEUS SITE OPERATIONS GMBH & CO. KG
    Inventors: Christian Nowottny, Birger Lehr, Hartmut Janitz, Zhenggang Yu, Li Chen
  • PROCESS FOR TREATMENT OF WASTEWATER
    Publication number: 20200071197
    Abstract: A process for the treatment of acidic wastewater which comprises hydrochloric acid, nitric acid as an optional component, 0.1 to 30 wt.-% of one or more dissolved metals selected from the group consisting of aluminum and heavy metals other than precious metals, and 10 to 500 wt.
    Type: Application
    Filed: March 9, 2017
    Publication date: March 5, 2020
    Inventors: Christian Nowottny, Birger Lehr, Hartmut Janitz, Zhenggang Yu, Li Chen