Patents by Inventor Daniele Negri

Daniele Negri 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).

  • Alkaline aqueous solutions and use thereof in processes for dyeing cellulosic textile materials
    Patent number: 6530961
    Abstract: Described are aqueous solutions comprising sodium hydroxide and potassium carbonate in a molar ratio of 1:1.7 to 1:0.5, which are useful for preparing alkaline dyeing liquors, especially padding liquors, of fiber-reactive dyes for producing dyeings on cellulosic textile material.
    Type: Grant
    Filed: July 31, 2000
    Date of Patent: March 11, 2003
    Assignee: DyStar Textilfarben GmbH & Co. Deutschland KG
    Inventors: Andreas Schrell, Daniele Negri
  • Blue dyeing mixtures of fiber-reactive dyestuffs and their use for dyeing fiber material containing hydroxy and/or carboxamide groups
    Patent number: 6171348
    Abstract: A dyestuff mixture containing one or more copper formazan dyestuffs of the formula (1), one or more disazo dyestuffs of the formula (2) and one or two monoazo dyestuffs of the formula (3)
    Type: Grant
    Filed: September 25, 1997
    Date of Patent: January 9, 2001
    Assignee: DyStar Textilfarben GmbH
    Inventors: Werner Hubert Russ, Andreas Von Der Eltz, Bengt-Thomas Gröbel, Daniele Negri
  • Alkali system for dyeing cellulosic textiles by padding methods
    Patent number: 5938796
    Abstract: Cellullosic textile materials are dyed by a pad or spraying process using a solution which contains 5-100 g/l of inorganic polyphosphate and has a pH of 10-13.5.
    Type: Grant
    Filed: May 8, 1998
    Date of Patent: August 17, 1999
    Assignee: DyStar Textilfarben GmbH & Co. Deutschland KG
    Inventors: Daniele Negri, Andreas Schrell
  • Mixtures of blue-dyeing fiber-reactive dyes and their use for dyeing hydroxy-and/or carboxamido-containing fiber material
    Patent number: 5704951
    Abstract: A solid or dissolved dye mixture of azo dyes having fiber-reactive groups of the vinyl sulfone series, yielding dyeings of blue color shade, comprising one or more copper formazane dyes of the general formula (1) shown and defined in claim 1, one or more disazo dyes of the general formula (2) shown and defined in claim 1, and one or two monoazo dyes of the general formula (3) shown and defined in claim 1, respectively in the description part of the patent application, which dye mixtures are suitable for dyeing hydroxy- and/or caroboxamido groups containing materials, in particular fiber materials, such as cellulose fibers, for example cotton, wool and synthetic polyamide fibers, also together with other suitable dyes in trichromatic dyeing.
    Type: Grant
    Filed: April 1, 1996
    Date of Patent: January 6, 1998
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Daniele Negri, Andreas Von Der Eltz, Werner Hubert Russ, Bengt-Thomas Grobel