Patents by Inventor Chien K. Tseng

Chien K. Tseng 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).

  • 1-Hydroxy-2-(alkylketo)-4,4,6,6-tetramethyl cyclohexen-3,5-dione herbicides
    Patent number: 4227919
    Abstract: Compounds having the following structural formula ##STR1## wherein R is alkyl which are useful as herbicides.
    Type: Grant
    Filed: August 6, 1979
    Date of Patent: October 14, 1980
    Assignee: Stauffer Chemical Company
    Inventors: Reed A. Gray, Chien K. Tseng, Ronald J. Rusay
  • 1-Hydroxy-2-(alkylketo)-4,4,6,6-tetramethyl cyclohexen-3,5-diones
    Patent number: 4202840
    Abstract: Compounds having the following structural formula ##STR1## wherein R is alkyl which are useful as herbicides.
    Type: Grant
    Filed: September 29, 1978
    Date of Patent: May 13, 1980
    Assignee: Stauffer Chemical Company
    Inventors: Reed A. Gray, Chien K. Tseng, Ronald J. Rusay
  • Derivatives of certain geranyl phenyl ethers
    Patent number: 3994981
    Abstract: Compounds having the formula ##SPC1##In which R is hydrogen, lower alkyl, lower alkenyl, lower alkoxy, halogen, nitro; or lower alkylthio; X is chlorine or bromine; A and B are each hydrogen, together form an epoxide link or together form a bond; the use of these compounds in controlling insects; and a method of preparing these compounds.
    Type: Grant
    Filed: July 5, 1973
    Date of Patent: November 30, 1976
    Assignee: Stauffer Chemical Company
    Inventors: Ferenc M. Pallos, Chien K. Tseng
  • Derivatives of certain geranyl phenyl ethers and their use in controlling insects
    Patent number: 3968252
    Abstract: Compounds having the formula ##SPC1##In which R is hydrogen, lower alkyl, lower alkenyl, lower alkoxy, halogen, nitro; or lower alkylthio; X is chlorine or bromine; A and B are each hydrogen, together form an epoxide link or together form a bond; the use of these compounds in controlling insects; and a method of preparing these compounds.
    Type: Grant
    Filed: March 6, 1975
    Date of Patent: July 6, 1976
    Assignee: Stauffer Chemical Company
    Inventors: Ferenc M. Pallos, Chien K. Tseng