Patents by Inventor Colin William Greenhalgh

Colin William Greenhalgh 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).

  • Benzodipyrrole dyestuffs
    Patent number: 4122087
    Abstract: Substituted 2,6-dioxo-2,6-dihydrobenzo[1:2-b, 4:5-b']difurans or -dipyrroles and processes for their manufacture. The compounds are dyestuffs which are particularly useful in the form of aqueous dispersions for application to polyester textile materials.
    Type: Grant
    Filed: March 15, 1978
    Date of Patent: October 24, 1978
    Assignee: Imperial Chemical Industries Limited
    Inventors: Colin William Greenhalgh, John Laurence Carey, David Francis Newton
  • Benzodifuran dyestuffs
    Patent number: 4115404
    Abstract: Substituted 2,6-dioxo-2,6-dihydrobenzo[1:2-b, 4:5-b.sup.1 ]difurans or -dipyrroles and processes for their manufacture. The compounds are dyestuffs which are particularly useful in the form of aqueous dispersions for application to polyester textile materials.
    Type: Grant
    Filed: March 1, 1977
    Date of Patent: September 19, 1978
    Assignee: Imperial Chemical Industries Limited
    Inventors: Colin William Greenhalgh, John Laurence Carey, David Francis Newton
  • Disperse dyestuff mixtures
    Patent number: 3995994
    Abstract: A process to color aromatic polyester textiles navy blue to black by dyeing, padding or printing with an aqueous dispersion of mixtures of four specified azo and anthraquinone disperse dyes.
    Type: Grant
    Filed: July 28, 1975
    Date of Patent: December 7, 1976
    Assignee: Imperial Chemical Industries Limited
    Inventors: Colin William Greenhalgh, Ronald Wynford Kenyon, Andrew John Logan
  • Disperse dyestuff mixtures
    Patent number: 3994679
    Abstract: A process to color in blue to black shades aromatic polyester textile materials by dyeing, padding or printing an aqueous dispersion of a dyestuff mixture of three or four specific azo and anthraquinone disperse dyes.
    Type: Grant
    Filed: July 28, 1975
    Date of Patent: November 30, 1976
    Assignee: Imperial Chemical Industries Limited
    Inventors: Colin William Greenhalgh, Ronald Wynford Kenyon, Andrew John Logan
  • Dyeing process
    Patent number: 3953162
    Abstract: Dyeing nylon by applying sulphonated or unsulphonated dyestuffs containing cyclic anhydride groups, anhydride forming dicarboxylic acid groups or half-esters or half-amides thereof, as free acids or as salts with ammonia or volatile amines, and heating the fibre until dyestuff fixation takes place.
    Type: Grant
    Filed: March 21, 1974
    Date of Patent: April 27, 1976
    Assignee: Imperial Chemical Industries Limited
    Inventors: Colin William Greenhalgh, David Francis Newton, Dennis Eckersley, Ian Cheetham, Duncan Adrian Sidney Phillips, Kenneth Dunkerley, Gerald Williams, Vibhas Chokshi
  • 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
  • Dyeing process
    Patent number: 3934972
    Abstract: Dyeing cellulose or cellulose/polyester blends by applying unsulphonated dyestuffs containing cyclic anhydride groups, anhydride-forming dicarboxylic acid groups or half-esters or half-amides thereof, as free acids or as salts with ammonia or volatile amines, and heating the fibre until dyestuff fixation takes place.
    Type: Grant
    Filed: March 18, 1974
    Date of Patent: January 27, 1976
    Assignee: Imperial Chemical Industries Limited
    Inventors: Colin William Greenhalgh, David Francis Newton, Dennis Eckersley, Ian Cheetham, Duncan Adrian Sidney Phillips, Kenneth Dunkerley, Gerald Williams, Vibhas Chokshi