Patents by Inventor Alfons Arquint

Alfons Arquint 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).

  • Disperse dyes
    Patent number: 6034226
    Abstract: Disperse dyes of formula ##STR1## wherein R is nitro or cyano, R.sub.1 is halogen, R.sub.2 is C.sub.1 -C.sub.4 alkyl which is unsubstituted or substituted by C.sub.1 -C.sub.3 alkoxy, halogen, cyano or phenyl, R.sub.3 is C.sub.1 -C.sub.4 alkyl, R.sub.4 is methyl or ethyl, R.sub.5 is hydrogen, methyl or ethyl, and R6 is methyl or ethyl, with the proviso that R.sub.5 is not hydrogen if R is nitro, R.sub.1 is halogen and R.sub.2 is C.sub.1 -C.sub.4 alkyl.These dyes are particularly suitable for dyeing and printing textile materials consisting of polyester fibres.
    Type: Grant
    Filed: May 13, 1999
    Date of Patent: March 7, 2000
    Assignee: Ciba Specialty Chemicals Corporation
    Inventors: Paul Herzig, Antoine Clement, Alfons Arquint
  • Azo dye mixtures
    Patent number: 5942604
    Abstract: A dye mixture, which comprises as component (A) a dye of formula as component (B) a dye of formula ##STR1## and/or as component (C) a dye of formula ##STR2## wherein D, X and Y are as defined in the specification. These dyes are particularly suitable for dyeing polyester fiber textile material.
    Type: Grant
    Filed: February 20, 1998
    Date of Patent: August 24, 1999
    Assignee: Ciba Specialty Chemicals Corporation
    Inventors: Paul Herzig, Antoine Clement, Romeo Dreier, Alfons Arquint
  • Disperse dyes
    Patent number: 5939579
    Abstract: Disperse dyes of formula wherein R is nitro or cyano, R.sub.1 is halogen, R.sub.2 is C.sub.1 -C.sub.4 alkyl which is unsubstituted or substituted by C.sub.1 -C.sub.3 alkoxy, halogen, cyano or phenyl, R.sub.3 is C.sub.1 -C.sub.4 alkyl, R.sub.4 is methyl or ethyl, R.sub.5 is hydrogen, methyl or ethyl, and R.sub.6 is methyl or ethyl, with the proviso that R.sub.5 is not hydrogen if R is nitro, R.sub.1 is halogen and R.sub.2 is C.sub.1 -C.sub.4 alkyl.These dyes are particularly suitable for dyeing and printing textile materials consisting of polyester fibres.
    Type: Grant
    Filed: July 6, 1998
    Date of Patent: August 17, 1999
    Assignee: Ciba Specialty Chemicals Corporation
    Inventors: Paul Herzig, Antoine Clement, Alfons Arquint
  • Process for the preparation of 2,3-dibromopropionyl chloride
    Patent number: 5344977
    Abstract: An improved process for the preparation of 2,3-dibromopropionyl chloride, which comprises brominating acrylic acid, adding iron powder or an iron salt to the resultant melt, chlorinating the dibromopropionic acid obtained, and removing the volatile components. The 2,3-dibromopropionyl chloride is obtained in high yield and purity and is an intermediate for synthesising in particular reactive dyes.
    Type: Grant
    Filed: January 22, 1993
    Date of Patent: September 6, 1994
    Assignee: Ciba-Geigy Corporation
    Inventors: Alfons Arquint, Peter Leupin