Patents by Inventor Weisun Feng

Weisun Feng 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 the preparation of gamma-butyrolactone
    Patent number: 5637735
    Abstract: A process for vapor phase hydrogenation of maleic anhydride and/or succinic anhydride to .gamma.-butyrolactone, comprising contacting an alcoholic solution of a feedstock anhydride with reduced Cu-Zn-Cr-Zr catalyst under the conditions of hydrogenation.
    Type: Grant
    Filed: August 9, 1995
    Date of Patent: June 10, 1997
    Assignees: China Petrochemical Corporation, Research Institute of Petroleum Processing SINOPEC
    Inventors: Lishan Tong, Haijing Wang, Weisun Feng, Guoqiang Gao, Xiangwei Li, Jinghui Deng, Xinjie Zhang