Patents by Inventor Hoi K. Lai

Hoi K. Lai 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: 5211736
    Abstract: A compound having the structural formula ##STR1##whereR is C.sub.2 -C.sub.8 alkylene having 2 to 4 carbon atoms linking X and Y;R.sup.1 is C.sub.1 -C.sub.8 linear or branched alkylene, C.sub.1 -C.sub.6 oxyalkylene, C.sub.1 -C.sub.6 thioalkylene or C.sub.1 -C.sub.6 aminoalkylene;R.sup.2 and R.sup.3 are the same or different and are hydrogen, halogen, C.sub.1 -C.sub.8 alkyl, C.sub.1 -C.sub.6 alkoxy, C.sub.1 -C.sub.6 alkylthio, C.sub.1 -C.sub.6 alkylsulfonyl, phenyl substituted phenyl, phenoxy, substituted phenoxy, cyano, nitro, --OCOR.sup.4, --COOR.sup.5, --CH.sub.m Q.sub.3-m or --OCH.sub.m Q.sub.3-m ;R.sup.4 is C.sub.1 -C.sub.4 alkyl;R.sup.5 is hydrogen or C.sub.1 -C.sub.4 alkyl;Q is halogen;X and Y are the same or different and are oxygen, sulfur, sulfinyl, sulfonyl or if one is NH, the other is sulfur;Z is nitrogen or CH; andm is 1, 2 or 3;and physiologically acceptable salts thereof,is disclosed. A process for synthesizing the compound of this invention is also set forth.
    Type: Grant
    Filed: February 7, 1992
    Date of Patent: May 18, 1993
    Assignees: Uniroyal Chemical Company, Inc., Uniroyal Chemical Ltd/Ltee
    Inventors: Hoi K. Lai, Robert A. Davis, Allen R. Blem
  • Patent number: 5145982
    Abstract: This invention relates to a novel class of azoles of 5,6-dihydro-1,4-oxathiins having fungicidal activity. The class of compounds is represented by formula (I) ##STR1## wherein: R is each independently halogen; trifluoromethyl; C.sub.1 -C.sub.8 alkyl; C.sub.3 -C.sub.6 cycloalkyl; C.sub.1 -C.sub.8 alkoxy; C.sub.1 -C.sub.8 alkoxycarbonyl; amino; substituted amino; aminocarbonyl; aminosulfonyl; C.sub.1 -C.sub.8 alkoxy sulfonyl; phenyl; phenoxy; phenyl or phenoxy mono-, di- or tri-substituted independently with halogen, trifluoromethyl, C.sub.1 -C.sub.8 alkyl or C.sub.1 -C.sub.8 alkoxy; or benzyl;G is Ch or N;m is 0 1 or 2; andn is 0, 1 or 2.Fungicidal compositions, methods of controlling fungi and methods for preparing the compounds are within the scope of the invention.
    Type: Grant
    Filed: October 25, 1991
    Date of Patent: September 8, 1992
    Assignees: Uniroyal Chemical Company, Inc., Uniroyal Chemical Ltd./Ltee
    Inventors: Hoi K. Lai, Robert A. Davis
  • Patent number: 5106409
    Abstract: A compound having the structural formula ##STR1## where R is C.sub.2 -C.sub.8 alkylene having 2 to 4 carbon atoms linking X and Y;R.sup.1 is C.sub.1 -C.sub.8 linear or branched alkylene, C.sub.1 -C.sub.6 oxyalkylene, C.sub.1 -C.sub.6 thioalkylene or C.sub.1 -C.sub.6 aminoalkylene;R.sup.2 and R.sup.3 are the same or different and are hydrogen, halogen, C.sub.1 -C.sub.8 alkyl, C.sub.1 -C.sub.6 alkoxy, C.sub.1 -C.sub.6 alkylthio, C.sub.1 -C.sub.6 alkylsulfonyl, phenyl, substituted phenyl, phenoxy, substituted phenoxy, cyano, nitro, --OCOR.sup.4, --COOR.sup.5, --CH.sub.m Q.sub.3-m or --OCH.sub.m Q.sub.3-m,R.sup.4 is C.sub.1 -C.sub.4 alkyl;R.sup.5 is hydrogen or C.sub.1 -C.sub.4 alkyl;Q is halogen;X and Y are the same or different and are oxygen, sulfur, sulfinyl, sulfonyl or if one is NH, the other is sulfur;Z is nitrogen or CH; andm is 1, 2 or 3;and physiologically acceptable salts thereof,is disclosed. A process for synthesizing the compound of this invention is also set forth.
    Type: Grant
    Filed: May 9, 1990
    Date of Patent: April 21, 1992
    Assignees: Uniroyal Chemical Company, Inc., Uniroyal Chemical Ltd.
    Inventors: Hoi K. Lai, Robert A. Davis, Allen R. Blem
  • Patent number: 5081143
    Abstract: This invention relates to a novel class of azoles of 5,6-dihydro-1,4-oxathiins having fungicidal activity. The class of compounds is represented by formula (I) ##STR1## wherein: R is each independently halogen; trifluoromethyl; C.sub.1 -C.sub.8 alkyl; C.sub.3 -C.sub.6 cycloalkyl; C.sub.1 -C.sub.8 alkoxy; C.sub.1 -C.sub.8 alkoxycarbonyl; amino; substituted amino; aminocarbonyl; aminosulfonyl; C.sub.1 -C.sub.8 alkoxy sulfonyl; phenyl; phenoxy; phenyl or phenoxy mono-, di- or tri-substituted independently with halogen, trifluoromethyl, C.sub.1 -C.sub.8 alkyl or C.sub.1 -C.sub.8 alkoxy; or benzyl;G is CH or N;m is 0 1 or 2; andn is 0, 1 or 2.Fungicidal compositions, methods of controlling fungi and methods for preparing the compounds are within the scope of the invention.
    Type: Grant
    Filed: August 10, 1990
    Date of Patent: January 14, 1992
    Assignees: Uniroyal Chemical Company, Inc., Uniroyal Chemical Ltd./Ltee
    Inventors: Hoi K. Lai, Robert A. Davis
  • Patent number: 5006153
    Abstract: The invention relates to compounds useful as fungicides and plant growth regulants represented by the formula ##STR1## in which: R is a substituent or a group of substituents representing halogen, low alkyl of 1 to 6 carbon atoms, phenyl, substituted phenyl, phenoxy, substituted phenoxy, naphthyl, nitro, cyano, low alkoxy, alkoxycarbonyl, or trifluoromethyl;X is single bond, oxygen, sulfur or sulfonyl;G is CH or nitrogen atom;m is an integer from 1 to 4 and a process of making the compound.
    Type: Grant
    Filed: November 29, 1989
    Date of Patent: April 9, 1991
    Assignees: Uniroyal Chemical Company, Inc., Uniroyal Chemical Ltd./Ltee.
    Inventors: Hoi K. Lai, Robert A. Davis, Allen R. Blem
  • Patent number: 4966910
    Abstract: This invention relates to a novel class of azoles of 5,6-dihydro-1,4-oxathins having fungicidal activity. The class of compounds is represented by formula (I) ##STR1## wherein R is each independently halogen; trifluoromethyl; C.sub.1 -C.sub.8 alkyl; C.sub.3 -C.sub.6 cycloalkyl; C.sub.1 -C.sub.8 alkoxy; C.sub.1 -C.sub.8 alkoxycarbonyl; amino; substituted amino; aminocarbonyl; aminosulfonyl; C.sub.1 -C.sub.8 alkoxy sulfonyl; phenyl; phenoxy; phenyl or phenoxy mono-, di- or tri-substituted independently with halogen, trifluoromethyl, C.sub.1 -C.sub.8 alkyl or C.sub.1 -C.sub.8 alkoxy; or benzyl;G is CH or N;m is 0 1 or 2; andn is 0, 1 or 2.Fungicidal compositions, methods of controlling fungi and methods for preparing the compounds are within the scope of the invention.
    Type: Grant
    Filed: October 18, 1989
    Date of Patent: October 30, 1990
    Assignees: Uniroyal Chemical Company, Inc., Uniroyal Chemical Ltd./Ltee
    Inventors: Hoi K. Lai, Robert A. Davis
  • Patent number: 4943311
    Abstract: A compound having the structural formula ##STR1## where R is C.sub.2 -C.sub.8 alkylene having 2 to 4 carbon atoms linking X and Y;R.sup.1 is C.sub.1 -C.sub.8 linear or branched alkylene, C.sub.1 -C.sub.6 oxyalkylene, C.sub.1 -C.sub.6 thioalkylene or C.sub.1 -C.sub.6 aminoalkylene;R.sup.2 and R.sup.3 are the same or different and are hydrogen, halogen, C.sub.1 -C.sub.8 alkyl, C.sub.1 -C.sub.6 alkoxy, C.sub.1 -C.sub.6 alkylthio, C.sub.1 -C.sub.6 alkylsulfonyl, phenyl, substituted phenyl, phenoxy, substituted phenoxy, cyano, nitro, --OCOR.sup.4, --COOR.sup.5, --CH.sub.m Q.sub.3-m or --OCH.sub.m Q.sub.3-m ;R.sup.4 is C.sub.1 -C.sub.4 alkyl;R.sup.5 is hydrogen or C.sub.1 -C.sub.4 alkyl;Q is halogen;X and Y are the same or different and are oxygen, sulfur, sulfinyl, sulfonyl or if one is NH, the other is sulfur;Z is nitrogen or CH; andm is 1, 2 or 3;and physiologically acceptable salts thereof,is disclosed. A process for synthesizing the compound of this invention is also set forth.
    Type: Grant
    Filed: May 9, 1988
    Date of Patent: July 24, 1990
    Assignees: Uniroyal Chemical Company, Inc., Uniroyal Chemical Ltd/Ltee
    Inventors: Hoi K. Lai, Robert A. Davis, Allen R. Blem
  • Patent number: 4857649
    Abstract: The invention relates to compounds useful as fungicides and plant growth regulants represented by the formula ##STR1## in which: R is a substituent or a group of substituents representing halogen, lower alkyl of 1 to 6 carbon atoms, phenyl, substituted phenyl, phenoxy, substituted phenoxy, naphthyl, nitro, cyano, lower alkoxy, alkoxycarbonyl, or trifluoromethyl;X is single bond, oxygen, sulfur or sulfonyl;G is CH or nitrogen atom;m is an integer from 1 to 4 and a process of making the compound.
    Type: Grant
    Filed: July 21, 1988
    Date of Patent: August 15, 1989
    Assignees: Uniroyal Chemical Company, Inc., Uniroyal Chemical LTD/LTEE
    Inventors: Hoi K. Lai, Robert A. Davis, Allen R. Blem