Patents by Inventor William J. E. Norris

William J. E. Norris 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).

  • Benzoquinone compounds
    Patent number: 5283355
    Abstract: Compounds of the Formula (5) and processes for their preparation and use, particularly in the manufacture of unsymmetrical triphenodioxazine dyes: ##STR1## wherein: Y is H, alkyl, substituted alkyl, alkoxy, Cl or Br;R is a group of Formula (3) ##STR2## R.sup.1 and R.sup.2 are each independently alkyl, or R.sup.1 and R.sup.2 together with the carbon atom to which they are attached form an optionally substituted 4, 5 or 6 membered alicyclic or heterocyclic ring;R.sup.3 is H;Z is Cl, Br or A--NH; andA is H or the residue of a primary amine.
    Type: Grant
    Filed: October 22, 1991
    Date of Patent: February 1, 1994
    Assignee: Imperial Chemical Industries PLC
    Inventor: William J. E. Norris