Patents by Inventor Ian John Fletcher

Ian John Fletcher 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).

  • Amphoteric fluorescent whitening agents
    Patent number: 7566349
    Abstract: The present invention provides novel bis-triazinylaminostilbene amphoteric fluorescent whitening agents, comprising both individual components and mixtures thereof, a process for their preparation, intermediates useful for their preparation and use of the fluorescent whitening agents for the fluorescent whitening of paper.
    Type: Grant
    Filed: June 11, 2007
    Date of Patent: July 28, 2009
    Assignee: Ciba Specialty Chemicals Corporation
    Inventors: Goetz Scheffler, Peter Rohringer, Ian John Fletcher
  • Amphoteric fluorescent whitening agents
    Patent number: 7247174
    Abstract: The present invention provides novel bis-triazinylaminostilbene amphoteric fluorescent whitening agents, comprising both individual components and mixtures thereof, a process for their preparation, intermediates useful for their prepartion and use of the fluorescent whitening agents for the fluorescents whitening of paper.
    Type: Grant
    Filed: November 11, 2003
    Date of Patent: July 24, 2007
    Assignee: Ciba Specialty Chemicals Corporation
    Inventors: Goetz Scheffler, Peter Rohringer, Ian John Fletcher
  • Biphenyl-substituted triazines
    Patent number: 6919454
    Abstract: Biphenyl-substituted triazines of the formula which are notable for high thermal stability, are used as stabilizers for organic polymers to counter damage thereto caused by light, oxygen and heat, as light stabilizers for textile fiber materials and as sunscreens for the human skin.
    Type: Grant
    Filed: August 18, 2004
    Date of Patent: July 19, 2005
    Assignee: Ciba Specialty Chemicals Corp.
    Inventors: Ian John Fletcher, Jürgen Kaschig, Georges Metzger, Dieter Reinehr, Pascal Hayoz
  • Biphenyl-substituted triazines
    Patent number: 6841670
    Abstract: Biphenyl-substituted triazines of the formulae which are notable for high thermal stability, are used as stabilizers for organic polymers to counter damage thereto caused by light, oxygen and heat, as light stabilizers for textile fiber materials and as sunscreens for the human skin.
    Type: Grant
    Filed: July 31, 2002
    Date of Patent: January 11, 2005
    Assignee: Ciba Specialty Chemicals Corporation
    Inventors: Ian John Fletcher, Jürgen Kaschig, Georges Metzger, Dieter Reinehr
  • Biphenyl-substituted triazines
    Publication number: 20030045444
    Abstract: Biphenyl-substituted triazines of the formulae 1
    Type: Application
    Filed: July 31, 2002
    Publication date: March 6, 2003
    Inventors: Ian John Fletcher, Jurgen Kaschig, Georges Metzger, Dieter Reinehr, Pascal Hayoz
  • Biphenyl-substituted triazines
    Patent number: 6468958
    Abstract: Biphenyl-substituted triazines of the formulae which are notable for high thermal stability, are used as stabilizers for organic polymers to counter damage thereto caused by light, oxygen and heat, as light stabilizers for textile fiber materials and as sunscreens for the human skin.
    Type: Grant
    Filed: May 3, 2001
    Date of Patent: October 22, 2002
    Assignee: Ciba Specialty Chemicals Corporation
    Inventors: Ian John Fletcher, Jürgen Kaschig, Georges Metzger, Dieter Reinehr, Pascal Hayoz
  • Biphenyl-Substituted Triazines
    Publication number: 20010039341
    Abstract: Biphenyl-substituted triazines of the formulae 1
    Type: Application
    Filed: May 3, 2001
    Publication date: November 8, 2001
    Inventors: Ian John Fletcher, Jurgen Kaschig, Georges Metzger, Dieter Reinehr, Pascal Hayoz
  • Biphenyl-substituted triazines
    Patent number: 6255483
    Abstract: Biphenyl-substituted triazines of the formulae which are notable for high thermal stability, are used as stabilizers for organic polymers to counter damage thereto caused by light, oxygen and heat, as light stabilizers for textile fiber materials and as sunscreens for the human skin.
    Type: Grant
    Filed: August 25, 1999
    Date of Patent: July 3, 2001
    Assignee: Ciba Specialty Chemicals Corporation
    Inventors: Ian John Fletcher, Jürgen Kaschig, Georges Metzger, Dieter Reinehr, Pascal Hayoz
  • Process
    Patent number: 5952524
    Abstract: The present invention provides a process for the production of a compound of formula: ##STR1## in which X and Y, independently, are hydrogen, halogen, NO.sub.2, CF.sub.3, CN, C.sub.1 -C.sub.4 alkyl, C.sub.1 -C.sub.4 alkoxy, COO--C.sub.1 -C.sub.4 alkyl, CO--C.sub.1 -C.sub.4 alkyl, NH--(C.sub.1 -C.sub.4 alkyl), N(C.sub.1 -C.sub.4 alkyl).sub.2, NH(C.sub.1 -C.sub.4 alkyl-OH), N(C.sub.1 -C.sub.4 alkyl-OH).sub.2, COOH or SO.sub.3 H or an ester or amide thereof, or COOM or SO.sub.3 M in which M is Na, K, Ca, Mg, ammonium, mono-, di-, tri- or tetra-C.sub.1 -C.sub.4 alkylammonium, mono-, di- or tri-hydroxyalkylammonium or ammonium that is di- or tri-substituted with a mixture of C.sub.1 -C.sub.4 alkyl and C.sub.1 -C.sub.4 hydroxyalkyl groups;Z is hydrogen, C.sub.1 -C.sub.4 alkyl, C.sub.1 -C.sub.4 alkoxy, CF.sub.3, halogen (F, Cl, Br, I), SO.sub.3 H or SO.sub.
    Type: Grant
    Filed: April 23, 1998
    Date of Patent: September 14, 1999
    Assignee: Ciba Specialty Chemicals Corporation
    Inventors: Victor Eliu, Werner Kanert, Adriano Indolese, Ian John Fletcher, Julia Volkel, Anita Schnyder