Patents by Inventor Chandrashekhar D. Patil

Chandrashekhar D. Patil 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).

  • Pigmented 1-naphtholsulphonic acid-based monoazo pigments
    Patent number: 6984724
    Abstract: The invention relates to novel monoazo compounds of formula (1), wherein R1 re resents H, Cl or CH3; R2 represents H or Cl; M2+ represents Mg2+, Mn2+ or Sr2+; Y1=represents COO? or SO3?; Y2=SO3?; Y3=Y4=Y5=H; or Y3=SO331 , Y2=Y4=Y5=H; or Y4=SO3?, Y2=Y3=Y5=H; or Y5=SO3?, Y2=Y3=Y4=H. The compounds of formula (1) are characterized by high intensity and light-fastness.
    Type: Grant
    Filed: July 27, 2002
    Date of Patent: January 10, 2006
    Assignee: Clariant GmbH
    Inventors: Hans Joachim Metz, Uday T. Nabar, Frank Morgenroth, Chandrashekhar D. Patil, Sunil D. Deval
  • Laked monoazo pigments based on naphtholsulfonic acids
    Patent number: 6913641
    Abstract: The invention relates to novel monoazo compounds of formula (1), wherein R represents H or Cl, M2+ represents Ca2+ or SR2+ and Y1=H and Y2=SO3? or Y1=SO3? and Y2=H. The compounds of formula (1) are characterized by their high drying power and high light-fastness.
    Type: Grant
    Filed: April 27, 2002
    Date of Patent: July 5, 2005
    Assignee: Clariant GmbH
    Inventors: Hans Joachim Metz, Uday T. Nabar, Frank Morgenroth, Chandrashekhar D. Patil, Sunil D. Deval
  • Pigmented 1-naphtholsulphonic acid-based monoazo pigments
    Publication number: 20040198964
    Abstract: The invention relates to novel monoazo compounds of formula (1), wherein R1 represents H, Cl or CH3; R2 represents H or Cl; M2+ represents Mg2+, Mn2+ or Sr2+; Y1=represents COO− or SO3−; Y2═SO3−, Y3═Y4═Y5═H; or Y3═SO3−, Y2═Y4═Y5═H; or Y4═SO3−, Y2═Y3═Y5═H; or Y5═SO3−, Y2═Y3═Y4═H. The compounds of formula (1) are characterized by high intensity and lightfastness.
    Type: Application
    Filed: February 13, 2004
    Publication date: October 7, 2004
    Inventors: Hans Joachim Metz, Uday T. Nabar, Frank Morgenroth, Chandrashekhar D Patil, Sunil D. Deval