Patents by Inventor Man Hon Tsang

Man Hon Tsang 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).

  • PREPARATION OF A SULFURIZED MOLYBDENUM AMIDE COMPLEX AND ADDITIVE COMPOSITIONS HAVING LOW RESIDUAL ACTIVE SULFUR
    Publication number: 20110077180
    Abstract: The invention is directed to oil soluble additive compositions, lubricating oil compositions derived from a process for preparing a sulfurized oil soluble molybdenum complex having reduced active sulfur comprising: reacting an acidic molybdenum compound with an amide derived from a carboxylic acid component an polyamine component in a ratio from 2:1 to 1:1; there after sulfurizing to provide a sulfurized oil soluble molybdenum which is subsequently treated with at least one compound capable of reacting with the active sulfur of step b).
    Type: Application
    Filed: September 30, 2009
    Publication date: March 31, 2011
    Inventors: Qunlai Chen, Man Hon Tsang, Gaurav Bhalla, William R. Ruhe, JR.