Patents by Inventor Roy Y. Yih

Roy Y. Yih 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).

  • Patent number: 4083713
    Abstract: This invention relates to the selective herbicidal activity of fluoroaminopyridazines. In particular, these compounds exhibit preemergence and postemergence herbicidal activity on many of the major weeds including perennial weeds such as nutsedge and quackgrass. These compounds are particularly effective in selectively controlling weeds in agronomic crops.
    Type: Grant
    Filed: March 14, 1975
    Date of Patent: April 11, 1978
    Assignee: Rohm and Haas Company
    Inventors: Roy Y. Yih, Wayne O. Johnson, Gerald E. Kollman
  • Patent number: 4076741
    Abstract: Compounds of the formula ##STR1## wherein X is a hydrogen atom, a halogen atom, a trihalomethyl group, an alkyl group, or a cyano group, andY is a hydrogen atom, a halogen atom, or a trihalomethyl group,And compositions containing these compounds exhibit herbicidal activity.
    Type: Grant
    Filed: February 12, 1973
    Date of Patent: February 28, 1978
    Assignee: Rohm and Haas Company
    Inventors: Horst O. Bayer, Colin Swithenbank, Roy Y. Yih
  • Patent number: 4070178
    Abstract: Diphenyl ethers of the formula ##STR1## whereinR.sup.1 is hydrogen or halogen,R.sup.2 is hydrogen, halogen, or cyano,R is ##STR2## wherein R.sup.3 is hydrogen, halogen, nitro, alkyl, or alkoxy,R.sup.4 is a divalent alkylene radical, andR.sup.5 is cyano or -COR.sup.6, wherein R.sup.6 is alkoxy, hydroxy or salt thereof, allyloxy, alkoxyalkoxy, amino, alkyl or dialkyl amino, aminoalkoxy, or alkyl or dialkylaminoalkoxy,And diphenyl sulfides, sulfoxides, and sulfones of the formula ##STR3## wherein R.sup.8 is hydrogen, halogen, cyano, nitro, alkyl, alkoxy, or trifluoromethyl,R.sup.2 is hydrogen, halogen or cyano,X is sulfur, sulfinyl, or sulfonyl, andR is as defined above,And compositions containing these compounds exhibit herbicidal activity.
    Type: Grant
    Filed: July 30, 1976
    Date of Patent: January 24, 1978
    Assignee: Rohm and Haas Company
    Inventors: Wayne O. Johnson, Roy Y. Yih
  • Patent number: 4063929
    Abstract: Salts of compounds of the formula ##STR1## wherein X is a hydrogen atom, a halogen atom, a trihalomethyl group, an alkyl group, or a cyano group, and Y is a hydrogen atom, a halogen atom, or a trihalomethyl group,And compositions containing these salts exhibit herbicidal activity.
    Type: Grant
    Filed: September 29, 1975
    Date of Patent: December 20, 1977
    Assignee: Rohm and Haas Company
    Inventors: Horst O. Bayer, Colin Swithenbank, Roy Y. Yih
  • Patent number: 4046798
    Abstract: Compounds of the formula ##STR1## wherein X is a hydrogen atom, a halogen atom, a trihalomethyl group, an alkyl group, or a cyano group,Y is a hydrogen atom, a halogen atom, or a trihalomethyl group, andZ is a hydroxy group, an alkoxy group, and alkyl group, a halogen atom, an amino group, an alkylthio group, a cyano group, a carboxy group, a carbalkoxy group, a carboxyalkyl group, a carbalkoxyalkyl group, an alkanoyloxy group, or a carbamoyloxy group,And compositions containing these compounds exhibit herbicidal activity.
    Type: Grant
    Filed: September 29, 1975
    Date of Patent: September 6, 1977
    Assignee: Rohm and Haas Company
    Inventors: Horst O. Bayer, Colin Swithenbank, Roy Y. Yih
  • Patent number: 4009021
    Abstract: Compounds of the formula ##STR1## wherein R.sup.1 and R.sup.2 are halogen, alkyl, alkoxy, trifluoromethyl or nitro,R.sup.3 and R.sup.4 are hydrogen or alkyl, andn and m are 0, 1, or 2,Are useful in regulating the growth of plants when applied to the plant, plant habitat, or plant seeds.
    Type: Grant
    Filed: October 30, 1975
    Date of Patent: February 22, 1977
    Assignee: Rohm and Haas Company
    Inventors: Roy Y. Yih, Pyung K. Yu
  • Patent number: 3950379
    Abstract: Compounds of the formula ##SPC1##WhereinX is a halogen atom or a trihalomethyl group,Y is a hydrogen atom, a halogen atom, a trihalomethyl group, or an alkyl group,Z is a hydrogen atom, a halogen atom, a cyano group, a trihalomethyl group, an alkyl group, or an alkoxy group, andZ' is a halogen atom, a cyano group, a trihalomethyl group, or, when X is a halogen atom, a nitro group,and compositions containing these compounds exhibit herbicidal activity.
    Type: Grant
    Filed: August 19, 1974
    Date of Patent: April 13, 1976
    Assignee: Rohm and Haas Company
    Inventors: Horst O. Bayer, Colin Swithenbank, Roy Y. Yih