Patents by Inventor Tom P. Chen

Tom P. Chen 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 and apparatus for the catalytic conversion of the exhaust discharge of internal combustion engines
    Patent number: 4206184
    Abstract: Catalytic conversion of the exhaust discharge of internal combustion engines is accomplished by contacting the discharge with a naturally-occurring mineral chrysocolla, the structure of which provides a sufficiently large surface area without further support, the chrysocolla serving as an oxidizing catalyst and which can also be modified to serve as both an oxidation and reduction catalyst. The invention includes the catalytic converter device incorporating the catalyst.
    Type: Grant
    Filed: July 23, 1976
    Date of Patent: June 3, 1980
    Inventor: Tom P. Chen
  • Process for oxidizing metal sulfides to elemental sulfur using activated carbon
    Patent number: 3930969
    Abstract: Accelerated reaction rates and improved yields are accomplished when sulfides of metals of groups Ib, IIb, IVa, Va and VIII of the Periodic Table are oxidized in aqueous medium to convert the sulfide sulfur to elemental sulfur by performing the reaction in the presence of activated carbon.
    Type: Grant
    Filed: June 28, 1974
    Date of Patent: January 6, 1976
    Assignee: Cyprus Metallurgical Processes Corporation
    Inventor: Tom P. Chen