Patents by Inventor Colin William Greenhaigh

Colin William Greenhaigh 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).

  • Coloration of polyesters
    Patent number: 4001169
    Abstract: Process for mass coloring synthetic linear polyesters which comprises incorporating into the preformed polyester one or more dyestuffs of the formulae:- ##STR1## wherein R is a group of the formula ##STR2## and X is a lower alkoxy, substituted lower alkoxy, lower alkylamino or acylamino radical which is free from hydroxy or carboxylic acid groups.
    Type: Grant
    Filed: February 26, 1974
    Date of Patent: January 4, 1977
    Assignee: Imperial Chemical Industries Limited
    Inventors: Ian Cheetham, Kenneth Dunkerley, Colin William Greenhaigh, James Albert Moyse, David Francis Newton