Patents by Inventor Bengao Li

Bengao Li 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).

  • Series of water-insoluble polymeric quaternary phosphonium salt used for bactericides
    Patent number: 6261538
    Abstract: Disclosed is a series of the water-insoluble polymeric quaternary phosphonium salt-type bactericides, which consists of as active bactericidal components an amino quaternary phosphonium salt, a quaternary ammonium group-containing quaternary phosphonium salt, an amino quaternary phosphonium salt-quaternay ammonium salt, or a quaternary ammonium salt-containing quaternary phosphonium salt and quaternary ammonium salt carried on a resin carrier which can be chloromethylated. Said bactericide series has rapid and highly effective bactericidal activity, and can be used repeatedly, and used widely for sterilizing and disinfecting various fluid media such as different industrial and domestic water and the like.
    Type: Grant
    Filed: October 28, 1998
    Date of Patent: July 17, 2001
    Assignees: China Petrochemical Corporation, Research Institute of Petroleum Processing, SINOPEC
    Inventors: Yongjun Chen, Xieqing Wang, Bengao Li