Patents by Inventor Prahalad Manibhai Mistry

Prahalad Manibhai Mistry 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: 7638609
    Abstract: A compound of Formula (1) or salt thereof: wherein: A is optionally substituted phenyl or naphthyl; B is optionally substituted phenylene or naphthylene; n is 0 or 1; and D is a pyrazolyl group, with the proviso that when A is an optionally substituted phenyl group and B is a phenylene group of Formula T, wherein Ra is OH or a C1-4-alkoxy group; and Rb is H or a C1-4-alkyl group, hydroxy group, C1-4-alkoxy group, C1-3-dialkyamino group or a group of the formula NHCORc (wherein Rc is C1-3-alkyl or an amino group); and * shows the point of attachment to the azo linkages on B in Formula (1); A is free from nitro groups. Also, claimed are compounds, compositions and ink-jet cartridges for use in an ink-jet printer and substrate printed with an ink-jet printer.
    Type: Grant
    Filed: November 18, 2004
    Date of Patent: December 29, 2009
    Assignee: Fujifilm Imaging Colorants Limited
    Inventors: Prahalad Manibhai Mistry, Roy Bradbury
  • Patent number: 7637992
    Abstract: A compound of Formula (1) and compounds of Formula (2) or a salt thereof: wherein: A is a beta naphthyl group of formula X, wherein * is the point of attachment to the azo group in Formula (1) or (2); p and q are each independently 0, 1 or 2 and the sum of p+q is not zero; B is optionally substituted phenylene or naphthylene; n is 0 or 1; and D is an optionally substituted pyrazolyl group. The compound or salt is useful in an ink for ink jet printing.
    Type: Grant
    Filed: April 27, 2007
    Date of Patent: December 29, 2009
    Assignee: Fujifilm Imaging Colorants Limited
    Inventor: Prahalad Manibhai Mistry
  • Publication number: 20090208713
    Abstract: A compound selected from the group consisting of compounds of Formula (1) and compounds of Formula (2) or a salt thereof: wherein: A is an optionally substituted alpha naphthyl group of formula X, wherein * is the point of attachment to the azo group in Formula (1) or (2); B is optionally substituted phenylene or naphthylene; n is 0 or 1; and D is an optionally substituted pyrazolyl group. The compound is useful in an ink for ink jet printing. Also provided are printing processes, ink compositions and ink-jet cartridges for use in an ink-jet printer and substrates printed using an ink-jet printer.
    Type: Application
    Filed: April 27, 2007
    Publication date: August 20, 2009
    Inventors: Prahalad Manibhai Mistry, Roy Bradbury, Lynn Patricia Bradbury
  • Publication number: 20090041939
    Abstract: A compound selected from the group consisting of compounds of Formula (1) and compounds of Formula (2) or a salt thereof: wherein: A is a beta naphthyl group of formula X, wherein * is the point of attachment to the azo group in Formula (1) or (2) p and q are each independently 0, 1 or 2 and the sum of p+q is not zero; B is optionally substituted phenylene or naphthylene; n is 0 or 1; and D is an optionally substituted pyrazolyl group. The compound or salt is useful in an ink for ink jet printing. Also provided are printing processes, ink compositions and ink-jet cartridges for use in an ink-jet printer and substrates printed using an ink-jet printer.
    Type: Application
    Filed: April 27, 2007
    Publication date: February 12, 2009
    Inventor: Prahalad Manibhai Mistry
  • Patent number: 7052538
    Abstract: A composition comprising a liquid medium and a compound of Formula (1) or salt thereof: wherein: A is optionally substituted phenyl or naphthyl provided A is not 2-sulpho-4-methoxyphenyl; B is optionally substituted phenylene or naphthylene; n is 0 or 1; D is a pyrazolonyl group; and wherein the liquid medium comprises an organic solvent. Also claimed are inks comprising said compositions and processes for printing.
    Type: Grant
    Filed: May 8, 2003
    Date of Patent: May 30, 2006
    Assignee: Avecia Limited
    Inventors: Prahalad Manibhai Mistry, Roy Bradbury
  • Patent number: 7041161
    Abstract: A composition comprising a liquid medium and a compound of Formula (1) or salt thereof: wherein: A is 2-sulpho-4-methoxyphenyl; B is optionally substituted phenylene or naphthylene; n is 0 or 1; and D is a pyrazolonyl group; wherein the liquid medium comprises an organic solvent, inks comprising this composition and printing processes.
    Type: Grant
    Filed: May 8, 2003
    Date of Patent: May 9, 2006
    Assignee: Avecia Limited
    Inventors: Prahalad Manibhai Mistry, Roy Bradbury
  • Patent number: 6746526
    Abstract: 1. A compound of Formula (1) and salts thereof: wherein: A is a substituted phenyl group carrying a group of the formula —NR3R4 and an ortho group selected from sulpho, phosphonato and phosphinato; n is 0 or 1; L1 and L2 are each independently H, optionally substituted alkyl, optionally substituted cycloalkyl or optionally substituted aryl, or L1 and L2 together with the N atom to which they are attached form an optionally substituted 5- or 6-membered ring; R1 and R2 are each independently optionally substituted alkyl or optionally substituted alkoxy; and R3 and R4 are each independently H, optionally substituted alkyl, optionally substituted cycloalkyl or optionally substituted aryl, or R3 and R4 together with the nitrogen atom to which they are attached form an optionally substituted 5- or 6-membered ring; or R3 is H, optionally substituted alkyl, optionally substituted cycloalkyl or optionally substituted aryl and R4 is an acyl group.
    Type: Grant
    Filed: March 27, 2002
    Date of Patent: June 8, 2004
    Assignee: Avecia Limited
    Inventor: Prahalad Manibhai Mistry
  • Patent number: 6712893
    Abstract: A compound of Formula (1) and salts thereof: In the formula, m is 1, 2 or 3; X is H or SO3H; R1 and R2 are each independently selected from optionally substituted alkyl and optionally substituted alkoxy; and R4 and R5 are each independently H, optionally substituted alkyl or optionally substituted aryl. When (i) at least one of R1 and R2 carries an —OH group; and (ii) when X is H at least one of R1 and R2 is optionally substituted alkyl. The compounds are useful as dyes for ink jet printing inks.
    Type: Grant
    Filed: June 28, 2001
    Date of Patent: March 30, 2004
    Assignee: Avecia Limited
    Inventors: Prahalad Manibhai Mistry, Roy Bradbury
  • Patent number: 6695899
    Abstract: A compound of Formula (1) and salts thereof: wherein: A is a substituted phenyl group carrying a group of the formula —NR3R4 and an ortho carboxy group; n is 0 or 1; L1 and L2 are each independently H, optionally substituted alkyl, optionally substituted cycloalkyl or optionally substituted aryl, or L1 and L2 together with the N atom to which they are attached form an optionally substituted 5- or 6-membered ring; R1 and R2 are each independently optionally substituted alkyl or optionally substituted alkoxy; and R3 and R4 are each independently H, optionally substituted alkyl, optionally substituted cycloalkyl or optionally substituted aryl, or R3 and R4 together with the N atom to which they are attached form an optionally substituted 5- or 6-membered ring; or R3 is H, optionally substituted alkyl, optionally substituted cycloalkyl or optionally substituted aryl; and R4 is an acyl group.
    Type: Grant
    Filed: March 26, 2002
    Date of Patent: February 24, 2004
    Assignee: Avecia Limited
    Inventor: Prahalad Manibhai Mistry
  • Patent number: 6689201
    Abstract: A compound of Formula (1) and salts thereof are useful as dyes for ink jet printing inks. In the formula (1), A is optionally substituted phenyl (other than carboxyl substituted); R1 and R2 are each independently optionally substituted alkyl or optionally substituted alkoxy; and R4 and R5 are each independently H, alkyl or optionally substituted aryl. In formula (1) at least one of R1 and R2 carries an —OH group.
    Type: Grant
    Filed: June 28, 2001
    Date of Patent: February 10, 2004
    Assignee: Avecia Limited
    Inventors: Prahalad Manibhai Mistry, Roy Bradbury
  • Patent number: 6652637
    Abstract: A compound of Formula (1) and salts thereof are useful as dyes for ink jet printing inks. In Formula (I) m is 1, 2 or 3; R1 and R2 are each independently optionally substituted alkoxy; and R4 and R5 are each independently H, optionally substituted alkyl or optionally substituted aryl; provided that at least one of R1 and R2 carries an —OH group.
    Type: Grant
    Filed: June 28, 2001
    Date of Patent: November 25, 2003
    Assignee: Avecia Limited
    Inventors: Prahalad Manibhai Mistry, Roy Bradbury
  • Patent number: 6559292
    Abstract: Compounds of Formula (1) and salts thereof: wherein: A is optionally substituted phenyl; R1 and R2 are each independently optionally substituted alkyl or optionally substituted alkoxy; and R4 and R5 are each independently H, optionally substituted alkyl or optionally substituted aryl; provided that (i) at least one of R1 and R2 carries an —OH group; and (ii) A is not of the formula:  wherein m is 1, 2 or 3. The compounds are useful as dyes for ink jet printing inks.
    Type: Grant
    Filed: June 28, 2001
    Date of Patent: May 6, 2003
    Assignee: Avecia Limited
    Inventors: Prahalad Manibhai Mistry, Roy Bradbury
  • Patent number: 6254669
    Abstract: A compound of the Formula (1) and salts thereof: wherein: Ar, Ar1, J, J1, X, X1 W, W1, L and m are as defined in the description. The compounds of Formula (1) are useful as additives in inks, especially ink jet printing inks, for reducing color bleed between adjacent printed regions. Also claimed are inks containing a compound of the Formula (1), a method of ink jet printing using the inks, a substrate printed with the ink and an ink jet printer cartridge containing the ink.
    Type: Grant
    Filed: August 5, 1999
    Date of Patent: July 3, 2001
    Assignee: Zeneca Limited
    Inventors: Aidan Joseph Lavery, Prahalad Manibhai Mistry, Ronald Wynford Kenyon
  • Patent number: 6086955
    Abstract: A compound of the Formula (1) and salts thereof: ##STR1## wherein: M is a metal or hydrogen;Pc is a phthalocyanine nucleus;R.sup.1 and R.sup.2 are each independently H or optionally substituted alkyl, aryl or aralkyl;R.sup.3 is an aminoalkyl group;L is a divalent organic linking group;x and y each independently have a value of 0.5 to 3.5; and(x+y) is from 3 to 4.A process for making the compounds of Formula (1). The compounds of Formula (1) are useful as colorants for inks which are used in for example ink jet printing of substrates such as paper, plastics, textile materials, metal or glass.
    Type: Grant
    Filed: April 7, 1998
    Date of Patent: July 11, 2000
    Assignee: Zeneca Limited
    Inventors: Prahalad Manibhai Mistry, Ronald Wynford Kenyon
  • Patent number: 6025486
    Abstract: A compound of formula (1) and salts thereof, wherein: M is a metal or hydrogen; Pc is a phthalocyanine nucleus; each R.sup.1 independently is H or optionally substituted alkyl aryl or aralkyl; each L.sup.1 independently is a divalent organic linking group; Z is an optionally substituted piperazinyl group; q is 1 or 2; x and y each independently have a value of 0.5 to 3.5; and (x+y) is from 2 to 5. A process for making the compounds of formula (1). The compounds of formula (1) are useful as colorants for inks which are used in for example ink jet printing of substrates such as paper, plastics, textile materials, metal or glass.
    Type: Grant
    Filed: April 7, 1998
    Date of Patent: February 15, 2000
    Assignee: Zeneca Limited
    Inventors: Prahalad Manibhai Mistry, Ronald Wynford Kenyon
  • Patent number: 6015896
    Abstract: A compound of formula (1) and salts thereof, wherein: M is a metal or hydrogen; Pc is phthalocyanine nucleus; R.sup.1, R.sup.2, W.sup.1 and W.sup.2 are each independently H or optionally substituted alkyl, aryl or aralkyl; R.sup.3 is an aminoalkyl group; L is a divalent organic linking group; x, y and t are each independently 0.5 to 2.5; and (x+y+t) is from 3 to 4. A process for making the compounds of formula (1). The compounds of formula (1) are useful as colorants for inks which are used in for example ink jet printing of substrates such as paper, plastics, textile materials, metal or glass.
    Type: Grant
    Filed: April 7, 1998
    Date of Patent: January 18, 2000
    Assignee: Zeneca Limited
    Inventors: Prahalad Manibhai Mistry, Ronald Wynford Kenyon
  • Patent number: 5922116
    Abstract: A compound of the Formula (1) and salts thereof: ##STR1## wherein: M is a metal or hydrogen;Pc is a phthalocyanine nucleus;each R.sup.1,W.sup.1 and W.sup.2 independently is H or optionally substituted alkyl, aryl or aralkyl;each L.sup.1 independently is a divalent organic linking group;Z is an optionally substituted piperazinyl group;q is 1 or 2;x,y and t each independently have a value of 0.5 to 2.5; and(x+y+t)is 3 to 4.A process for making the compounds of Formula (1). The compounds of Formula (1) are useful as colorants for inks which are used in for example ink jet printing of substrates such as paper, plastics, textile materials, metal or glass.
    Type: Grant
    Filed: April 7, 1998
    Date of Patent: July 13, 1999
    Assignee: Zeneca Limited
    Inventors: Prahalad Manibhai Mistry, Ronald Wynford Kenyon
  • Patent number: 5891230
    Abstract: A bisazo dye of Formula (1) and salts thereof: ##STR1## in which R is H;R.sub.1 and R.sub.2 each independently is H, optionally substituted C.sub.1-4 -alkyl or optionally substituted aryl;R.sub.3 and R.sub.4 are each independently --OC.sub.1-4 -alkyl;R.sub.5 is H;R.sub.6 is COOH; andn is 1, 2 or 3.The dyes are useful for ink jet printing.
    Type: Grant
    Filed: October 9, 1997
    Date of Patent: April 6, 1999
    Assignee: Zeneca Limited
    Inventors: Peter Gregory, Prahalad Manibhai Mistry, Roy Bradbury, Paul Wight
  • Patent number: 5888286
    Abstract: A bisazo dye of Formula (1) and salts thereof: ##STR1## wherein: R.sub.1 and R.sub.2 each independently is H, optionally substituted C.sub.1-4 -alkyl or optionally substituted aryl;R.sub.3 is --NH.sub.2 ;R.sub.4 is OC.sub.1-4 -alkyl;each R.sub.5 independently is --COOH or --SO.sub.3 H; andn is 1,2, or 3.Also claimed are inks containing the dye, a process of ink jet printing using the inks and substrates coloured by the inks.
    Type: Grant
    Filed: October 9, 1997
    Date of Patent: March 30, 1999
    Assignee: Zeneca Limited
    Inventors: Peter Gregory, Prahalad Manibhai Mistry, Roy Bradbury, Paul Wight
  • Patent number: 5882392
    Abstract: A dye of Formula (1) and salts thereof: ##STR1## in which R is H, --NHC.sub.1-4 -alkylN(C.sub.1-4 -alkyl).sub.2 or ##STR2## R.sub.1 and R.sub.2 each independently is H, optionally substituted C.sub.1-4 -alkyl or optionally substituted aryl;R.sub.3 is C.sub.1-4 -alkyl;R.sub.4 is C.sub.1-4 -alkyl or OC.sub.1-4 -alkyl;R.sub.5 is H;R.sub.6 is COOH; andn is 1, 2 or 3.The dyes are useful for preparing ink jet printer inks.
    Type: Grant
    Filed: October 9, 1997
    Date of Patent: March 16, 1999
    Assignee: Zeneca Limited
    Inventors: Peter Gregory, Prahalad Manibhai Mistry, Roy Bradbury, Paul Wight