Patents by Inventor Denis R. A. Ridyard

Denis R. A. Ridyard 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).

  • Patent number: 5175261
    Abstract: A water-soluble compound of Formula (1) which is useful for coloring e.g. cellulosic materials, animal furs and animal skins such as leather. ##STR1## wherein: A is optionally substituted phenylene or naphthylene;X is a cellulose-reactive group;p is greater than or equal to 1;T.sup.1 and T.sup.2 are each independently selected from H, CN, CO.sub.2 R.sup.2, CONR.sup.2 R.sup.3, COR.sup.2, alkyl, aralkyl, cycloalkyl, aryl or a heterocyclic radical, which are unsubstituted or substituted;Z is a divalent linking group containing from 2 to 6 carbon atoms;n is from 2 to 6;R.sup.1 is H or sulpho; andR.sup.2 and R.sup.3 are each independently H or C.sub.1-6 -alkyl;and salts thereof.
    Type: Grant
    Filed: August 1, 1991
    Date of Patent: December 29, 1992
    Assignee: Imperial Chemical Industries PLC
    Inventor: Denis R. A. Ridyard
  • Patent number: 5171852
    Abstract: Triphenodioxazine reactive dyes, useful for dyeing cellulosic fibers, of the formula: ##STR1## wherein each of T.sup.1 and T.sup.2, independently, represents H, Cl, Br, F, SO.sub.3 H or an optionally substituted alkyl or aryl radical;R.sup.1 represents H or an optionally substituted hydrocarbon or heterocyclic radical;R.sup.2 represents an optionally substituted hydrocarbon radical;A represents C.sub.1-4 -alkyl, C.sub.1-4 -alkoxy, Cl, COOH or SO.sub.3 H, andn has a value of 0 or 1,the nature of the substituents being such that the dyes contain at least two SO.sub.3 H groups and at least two fibre-reactive groups.
    Type: Grant
    Filed: April 25, 1990
    Date of Patent: December 15, 1992
    Assignee: Imperial Chemical Industries PLC
    Inventors: Andrew H. M. Renfrew, Denis R. A. Ridyard, Brian Lamble
  • Patent number: 5019134
    Abstract: Triphenodioxazine reactive dyes containing at least one fiber-reactive group, the dye, in the free acid form, having the formula: ##STR1## wherein each of T.sup.1 and T.sup.2, independently, represents H, Cl, Br, F, SO.sub.3 H or an optionally substituted alkyl or aryl radical;each of A.sup.1 and A.sup.2 represents alkyl, alkoxy, Cl, Br, COOH, SO.sub.3 H or optionally substituted sulphamoyl;n has a value of 0, 1 or 2;m has a value of 1 or 2;R.sup.1 represents H or a group of the formula: ##STR2## wherein Z represents a fiber-reactive group;each of R.sup.2 and R.sup.3, independently, represents H or an optionally substituted hydrocarbon radical;B represents an optionally substituted divalent hydrocarbon radical; andD represents a group of the formula ##STR3## wherein R.sup.4 represents H, an optionally substituted hydrocarbon radical free from fiber-reactive residues or an acyl radical;R.sup.5 represents H or an optionally substituted hydrocarbon radical;R.sup.
    Type: Grant
    Filed: August 8, 1989
    Date of Patent: May 28, 1991
    Assignee: Imperial Chemical Industries PLC
    Inventors: Denis R. A. Ridyard, Peter Smith
  • Patent number: 4881943
    Abstract: A disperse monoazo dye of the formula: ##STR1## wherein each of R and R.sup.3 represents a lower alkyl radical, R.sup.1 represents a lower alkyl or C.sub.3 -C.sub.6 alkenyl radical andR.sup.2 represents a C.sub.2 -C.sub.6 alkyl radical carrying a hydroxy or acyloxy substituent.
    Type: Grant
    Filed: June 28, 1988
    Date of Patent: November 21, 1989
    Assignee: Imperial Chemical Industries PLC
    Inventors: David Brierley, Ronald W. Kenyon, Denis R. A. Ridyard
  • Patent number: 4330468
    Abstract: Water-soluble monoazo dyes for nylon having the formula: ##STR1## wherein ring A may optionally be substituted by halogen, trifluoromethyl, alkoxy, acylamino or alkyl having from 1 to 4 carbon atoms, R represents hydrogen or unbranched alkyl having from 1 to 4 carbon atoms, R.sup.1 represents hydrogen, alkyl or hydroxyalkyl, X represents unbranched alkyl having from 1 to 6 carbon atoms, cycloalkyl, halogen, nitro, trifluoromethyl, sulpho, vinylsulphonyl, hydroxyethylsulphonyl, sulphatoethylsulphonyl, --SO.sub.2 NHR.sup.2, wherein R.sup.2 represents hydrogen or alkyl having from 1 to 4 carbon atoms, or --COOR.sup.3 wherein R.sup.3 represents hydrogen, alkyl having from 1 to 7 carbon atoms, cycloalkyl or aryl, and n represents an integer of from 0 to 3.The dyes are suitable for application to polyamide textile materials. They give a high degree of thermal stability and fastness to wet treatments and to light.
    Type: Grant
    Filed: July 26, 1978
    Date of Patent: May 18, 1982
    Assignee: Imperial Chemical Industries, Limited
    Inventors: David Brierley, Denis R. A. Ridyard, Michael Yelland
  • Patent number: 4213759
    Abstract: Differential-dyeing nylon fibres are dyed or printed with a mixture of compatible dyes selected from spcified classes of yellow, orange, red and blue disulphonated or monosulphonated/monocarboxylated monoazo, disazo and anthraquinone dyes.
    Type: Grant
    Filed: November 20, 1978
    Date of Patent: July 22, 1980
    Assignee: Imperial Chemical Industries Limited
    Inventors: Denis R. A. Ridyard, Charles W. Taylor
  • Patent number: 4145340
    Abstract: A water-soluble azo dye having the general formula: ##STR1## wherein A represents the residue of a diazo component of the benzene or naphthalene series; E represents the residue of a coupling component of the arylamine, naphthol, phenol, 5-pyrazolone, 5-aminopyrazole or acylacetarylamide series; X represents .dbd.N--, .dbd.C--Cl or .dbd.C--CN; Y represents chlorine or bromine, Q.sup.1 represents --O--, --S-- or --NR.sup.4 -- in which R.sup.4 represents hydrogen or lower alkyl; Q.sup.2 represents a direct link, --O--, --S--, --CO--, --SO.sub.2 --, --SO.sub.2 NH--, --NHSO.sub.2 --, --CONH--, --NHCO--, --COO--, --OCO--, --OSO.sub.2 -- or --NR.sup.5 -- in which R.sup.5 represents hydrogen or lower alkyl; R.sup.1 represents an arylene radical; R.sup.2 represents an optionally substituted alkyl, cycloalkyl, aralkyl or aryl radical such that R.sup.1 and R.sup.2 together contain from 14 to 18 carbon atoms; R.sup.3 represents hydrogen or lower alkyl and n is a whole number having a value from 1 to 3.
    Type: Grant
    Filed: February 2, 1977
    Date of Patent: March 20, 1979
    Assignee: Imperial Chemical Industries Limited
    Inventor: Denis R. A. Ridyard