Patents by Inventor Chung-Ji Ischang

Chung-Ji Ischang 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).

  • Use of salts of sulfonamidocarboxylic acids as corrosion inhibitors in aqueous systems
    Patent number: 4911888
    Abstract: Specific sulfonamidocarboxylic acids in the form of the alkali metal or alkanolamine salts are used as corrosion inhibitors in aqueous systems.
    Type: Grant
    Filed: June 6, 1988
    Date of Patent: March 27, 1990
    Assignee: BASF Aktiengesellschaft
    Inventors: Rolf Fikentscher, Gerold Braun, Chung-Ji Ischang, Christos Vamvakaris, Reinhold Kohlhaupt