Patents by Inventor Nigel Hughes

Nigel Hughes 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).

  • Monoazo compounds derived from 2-hydroxymethyl-amino benzoic acids and 2,6-dihydroxypyridines
    Patent number: 3936437
    Abstract: The disperse monoazo dyestuffs, free from sulphonic acid groups, which are represented by the formula: ##SPC1##Wherein X is alkyl, substituted alkyl, phenyl or optionally substituted carbamoyl; Y is a hydrogen atom or a substituent; and Z is a hydrogen atom or an optionally substituted alkyl, cycloalkyl, aryl or heterocyclic radical or an optionally substituted amino group, a process for the manufacture of the said dyestuffs and their use for coloring synthetic textile materials.
    Type: Grant
    Filed: December 17, 1973
    Date of Patent: February 3, 1976
    Assignee: Imperial Chemical Industries Limited
    Inventors: Brian Ribbons Fishwick, Colin William Greenhalgh, Nigel Hughes