Patents by Inventor Sonia Megert

Sonia Megert 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).

  • Fluorescent maleimides and uses thereof
    Patent number: 6960667
    Abstract: The present invention is directed to maleimides and preparation of compounds of the formula I wherein R1 and R2 independently from each other stand for variously substituted, and R3 stands for allyl, variously substituted, with the proviso, that R1 and R2 not simultaneously stand for phenyl.
    Type: Grant
    Filed: October 10, 2002
    Date of Patent: November 1, 2005
    Assignee: Ciba Specialty Chemicals Corporation
    Inventors: Kazuhiko Kunimoto, Junji Otani, Kunihiko Kodama, Hiroshi Yamamoto, Patrick Verhoustraeten, Sonia Megert, Adalbert Braig
  • Process for removing stain in a photographic material
    Patent number: 6890706
    Abstract: A process for removing stain in a photographic material is described which process comprises incorporation of at least one compound of the formula (I) wherein X is O or NH; n is 1 or 2, p is 0, 1 or 2, M is hydrogen, an alkali metal atom, ammonium or a cation formed from an amine; each R1, independently, is an aminoacid residue from which a hydrogen atom on the amino group has been removed; each R2, independently, is hydrogen, C1-C8alkyl, C1-C8alkoxy, halogen, cyano, COOR, wherein R is hydrogen or C1-C3alkyl, CONH—R in which R has its previous significance, SO2NH—R in which R has its previous significance, NH—COR in which R has its previous significance, or SO3M, wherein M has its previous significance, or, if n is 1, R2 can also be CO—R3 in which R3 is C1-C3alkyl or phenyl, in that photographic material.
    Type: Grant
    Filed: November 20, 2002
    Date of Patent: May 10, 2005
    Assignee: Ciba Specialty Chemicals Corporation
    Inventors: Christophe Bulliard, Georges Metzger, Sonia Megert
  • Fluorescent maleimides and uses thereof
    Publication number: 20030189191
    Abstract: Fluorescent maleimides of the formula I 1
    Type: Application
    Filed: October 10, 2002
    Publication date: October 9, 2003
    Inventors: Kazuhiko Kunimoto, Junji Otani, Kunihiko Kodama, Hiroshi Yamamoto, Patrick Verhoustraeten, Sonia Megert, Adalbert Braig
  • Process for removing stain in a photographic material
    Publication number: 20030148231
    Abstract: A process for removing stain in a photographic material is described which process comprises incorporation of at least one compound of the formula (I) 1
    Type: Application
    Filed: November 20, 2002
    Publication date: August 7, 2003
    Inventors: Christophe Bulliard, Georges Metzger, Sonia Megert
  • Fluorescent maleimides and uses thereof
    Patent number: 6508957
    Abstract: The present invention relates to methods for using a maleimide of formula (I) with the proviso that R1 and R2 do not simultaneously stand for phenyl or a maleimide of formula Ia as UV fluorescent material for void detection and for the preparation of scintillators films, luminescent solar energy collectors, organic electroluminescent devices, printing inks, non-impact printing inks, electrophotographic toners, color filters, and colored high molecular organic material.
    Type: Grant
    Filed: May 21, 2001
    Date of Patent: January 21, 2003
    Assignee: Ciba Specialty Chemicals Corporation
    Inventors: Kazuhiko Kunimoto, Junji Otani, Kunihiko Kodama, Hiroshi Yamamoto, Patrick Verhoustraeten, Sonia Megert, Adalbert Braig
  • Process for the removing stain in a photographic material
    Patent number: 6506545
    Abstract: A process for removing stain in a photographic material is described which process comprises incorporation of at least one compound of formula (I) wherein X is O or NH; n is 1 or 2, p is 0, 1 or 2, M is hydrogen, an alkali metal atom, ammonium or a cation formed from an amine; each R1, independently, is an amimoacid residue from which a hydrogen atom on the amino group has been removed; each R2, independendy, is hydrogen, C1-C8alkyl, C1-C8alkoxy, halogen, cyano, COOR, wherein R is hydrogen or C1-C3alky1, CONH—R in which R has its previous significance, SO2NH—R in which R has its previous significance, NH—COR in which R has its previous significance, or SO3M, wherein M has its previous significance, or, if n is 1, R2 can also be CO—R3 in which R3 is C1-C3alkyl or phenyl, in that photographic material.
    Type: Grant
    Filed: September 13, 2001
    Date of Patent: January 14, 2003
    Assignee: Ciba Specialty Chemicals Corporation
    Inventors: Christophe Bulliard, Georges Metzger, Sonia Megert
  • Fluorescent maleimides and uses thereof
    Publication number: 20020065422
    Abstract: The present invention relates to methods for using a maleimide of formula (I) 1
    Type: Application
    Filed: May 21, 2001
    Publication date: May 30, 2002
    Inventors: Kazuhiko Kunimoto, Junji Otani, Kunihiko Kodama, Hiroshi Yamamoto, Patrick Verhoustraeten, Sonia Megert, Adalbert Braig
  • Fluorescent maleimides and uses thereof
    Patent number: 6258954
    Abstract: The present invention relates to compounds of formula I provided that R1 and R2 not simultaneously stand for phenyl, the use thereof in, for example, electroluminescent devices and as void detection compounds.
    Type: Grant
    Filed: August 22, 2000
    Date of Patent: July 10, 2001
    Assignee: Ciba Specialty Chemicals Corp.
    Inventors: Kazuhiko Kunimoto, Junji Otani, Kunihiko Kodama, Hiroshi Yamamoto, Patrick Verhoustraeten, Sonia Megert, Adalbert Braig