Patents by Inventor John Stuart Manson

John Stuart Manson 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).

  • Anthraquinone dyes
    Patent number: 4083858
    Abstract: A process for the manufacture of water-soluble anthraquinone dyes having the general formula: ##STR1## wherein Z represents an optionally substituted hydrocarbon residue carrying at least one half sulphuric acid ester or sulphonic acid group which comprises reacting 1,8-dihydroxy-4-amino-5-nitroanthraquinone with a primary amine of the formula:Z-NH.sub.2in the presence of boric acid or its anhydride or a derivative thereof and a secondary or tertiary organic base or a polar solvent.
    Type: Grant
    Filed: August 12, 1975
    Date of Patent: April 11, 1978
    Assignee: Imperial Chemical Industries Limited
    Inventors: John Stuart Manson, Denis Robert Annesley Ridyard
  • Anthraquinone dyes
    Patent number: 3935248
    Abstract: A water-soluble anthraquinone dye having the general formula: ##SPC1##Wherein Z represents an optionally substituted hydrocarbon residue carrying at least one half sulphuric acid ester or sulphonic acid group. The dyes are suitable for the coloration of polyamide textile materials.This is a continuation of application Ser. No. 243,857 filed Apr. 13, 1972, now abandoned.
    Type: Grant
    Filed: November 19, 1974
    Date of Patent: January 27, 1976
    Assignee: Imperial Chemical Industries Limited
    Inventors: John Stuart Manson, Denis Robert Annesley Ridyard