Patents by Inventor Jinrea Ko

Jinrea Ko 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).

  • Process for the preparation of pyrethroid acids
    Patent number: 4691052
    Abstract: Pyrethroid acids are prepared by conducting a cycloaddition reaction of a conjugated diene and a dihaloketene to form a dihalo-vinylcyclobutanone product; reducing the dihalo-vinylcyclobutanone product to a monohalo-vinylcyclobutanone product and then conducting a ring contraction with a base to form the desired acid product.
    Type: Grant
    Filed: May 30, 1986
    Date of Patent: September 1, 1987
    Assignee: S.C. Johnson & Son, Inc.
    Inventors: William T. Brady, Scott J. Norton, Jinrea Ko