Patents by Inventor Yi-Qiu Wei

Yi-Qiu Wei 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).

  • Herbicidal hydroxybenzyl-substituted heteroaryl compounds and derivatives thereof
    Patent number: 5672567
    Abstract: Herbicidal substituted hydroxybenzyl-heteroaryl compounds and derivatives thereof of the formula ##STR1## wherein Ar is a substituted or unsubstituted 5- or 6-membered heteroaryl group having 2 or 3 ring nitrogen atoms or a substituted or unsubstituted 5-membered heteroaryl group having two ring heteroatoms, one of the ring heteroatoms being nitrogen and the other being sulfur or oxygen. Herbicidal compositions containing such substituted hydroxybenzyl-heteroaryl compounds and derivatives thereof and methods of controlling undesirable vegetation employing these compounds and derivatives are also disclosed. The compounds in which XR is hydroxyl are also useful as intermediates for producing the disclosed substituted hydroxybenzyl-heteroaryl derivatives.
    Type: Grant
    Filed: March 25, 1996
    Date of Patent: September 30, 1997
    Assignee: Zeneca Limited
    Inventors: Hsiao-Ling M. Chin, Yi-Qiu Wei, Nhan H. Nguyen, David B. Kanne
  • Herbicidal hydroxybenzyl-substituted heteroaryl compounds and derivatives thereof
    Patent number: 5670453
    Abstract: Herbicidal substituted hydroxybenzyl-heteroaryl compounds and derivatives thereof of the formula ##STR1## wherein Ar is a substituted or unsubstituted 5- or 6-membered heteroaryl group having 2 or 3 ring nitrogen atoms or a substituted or unsubstituted 5-membered heteroaryl group having two ring heteroatoms, one of the ring heteroatoms being nitrogen and the other being sulfur or oxygen. Herbicidal compositions containing such substituted hydroxybenzyl-heteroaryl compounds and derivatives thereof and methods of controlling undesirable vegetation employing these compounds and derivatives are also disclosed. The compounds in which XR is hydroxyl are also useful as intermediates for producing the disclosed substituted hydroxybenzyl-heteroaryl derivatives.
    Type: Grant
    Filed: June 6, 1995
    Date of Patent: September 23, 1997
    Assignee: Zeneca Limited
    Inventors: Hsiao-Ling M. Chin, Yi-Qiu Wei, Nhan H. Nguyen, David B. Kanne
  • 4-substituted pyridyl-3-carbinol compositions and a co-herbicide
    Patent number: 5585327
    Abstract: 4-substituted pyridyl-3-carbinols of the formula ##STR1## wherein R is hydrogen, or an acyl, alkyl or carbamyl group exhibit desirable preemergent and postemergent herbicidal activity. Also disclosed are herbicidal compositions comprising such compounds and methods of controlling undesirable vegetation employing such compounds. The compounds wherein AR is hydroxyl serve as useful intermediates for the production of the alpha-benzyl substituted compounds as well as exhibiting herbicidal activity.
    Type: Grant
    Filed: May 2, 1994
    Date of Patent: December 17, 1996
    Assignee: Zeneca Limited
    Inventors: Hsiao-Ling Chin, Yi-Qiu Wei, Nhan H. Nguyen, Michael P. Ensminger, Linda Willitts, Derek P. Dagarin