Patents by Inventor Hua Chao

Hua Chao 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).

  • Alkylation of amine compounds
    Patent number: 4792629
    Abstract: Alkylamines are self-alkylated to longer carbon chain alkylamines using a catalyst mixture comprising ruthenium carbonyl and a compound of the formula (cyclopentadienyl).sub.n MY.sub.4-n where M is Zr, Hf or Ti, Y is individually selected from hydrogen, C.sub.1 -C.sub.5 alky, C.sub.6 -C.sub.20 aryl, C.sub.1 -C.sub.25 metalalkyl and halogen and n is 1, 2, 3 or 4.
    Type: Grant
    Filed: February 24, 1987
    Date of Patent: December 20, 1988
    Assignee: Shell Oil Company
    Inventor: Kuo-Hua Chao
  • Alkylation of amine compounds
    Patent number: 4783554
    Abstract: Alkylamines are self-alkylated to longer carbon chain alkylamines using a catalyst mixture comprising of aluminum chloride in combination with cobalt and/or ruthenium carbonyl.
    Type: Grant
    Filed: December 10, 1986
    Date of Patent: November 8, 1988
    Assignee: Shell Oil Company
    Inventor: Kuo-Hua Chao