Patents by Inventor Peter Hanson

Peter Hanson 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).

  • Preparation of substituted aryl compounds
    Patent number: 5416235
    Abstract: A process for the preparation of aromatic compounds of the general formula I,Ar--X Iin which Ar represents an optionally substituted aryl group and X represents a group OH, Cl, Br or CN, by reaction of an aryl diazoniumsalt of the formula II,Ar--N.dbd.N.sup.+ Y.sup.- IIin which Ar is as defined above and Y represents a suitable counterion, with water, hydrogen chloride or a salt thereof, hydrogen bromide or a salt thereof, or a cyanide in the presence of a copper(I)salt, characterized in that the copper(I)salt is a copper(I)salt derived from an hydroxy carboxylic acid.
    Type: Grant
    Filed: November 1, 1993
    Date of Patent: May 16, 1995
    Assignee: Octel Chemicals Limited
    Inventors: Bruce C. Gilbert, Peter Hanson, Jason R. Jones, Allan W. Timms