Patents by Inventor Georg Robert

Georg Robert 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).

  • Process for the production of resist prints
    Patent number: 5554195
    Abstract: This invention relates to a process for the production of resist prints on two-dimensional textile materials, which is characterized by the steps of impregnating with a water-repellent those parts of one side of a textile piece which are to be given a resist effect, drying said textile piece and dyeing the textile piece by applying an aqueous liquor to the reverse side.
    Type: Grant
    Filed: June 1, 1995
    Date of Patent: September 10, 1996
    Assignee: Sandoz Ltd.
    Inventor: Georg Robert
  • Reduction clearing of disperse dyes
    Patent number: 4286961
    Abstract: The present invention relates to an after-dyeing treatment process for synthetic/cellulosic fibre mixed substrates which have been dyed with at least one disperse and at least one reactive dye in which after fixation, the dyed or printed substrate is reductively treated at a neutral to alkaline pH with an aqueous solution containing reducing agent, whereby non-bound disperse dyestuff is decomposed such that it does not re-build up on the substrate whilst the fixed reactive dyestuff remains substantially unaffected.
    Type: Grant
    Filed: August 2, 1979
    Date of Patent: September 1, 1981
    Assignee: Sandoz Ltd.
    Inventors: Rolf Buser, Francis Palacin, Georg Robert, Franz Somm
  • Dyeing and printing with synthetic thickeners
    Patent number: 4181498
    Abstract: Disclosed is a process for dyeing or printing a textile substrate employing an aqueous paste comprising dyestuff and a synthetic thickener, which process comprises the step of applying an electrolyte to the substrate prior to or after application of said aqueous paste, said paste being free from added electrolyte.
    Type: Grant
    Filed: September 20, 1976
    Date of Patent: January 1, 1980
    Assignee: Sandoz Ltd.
    Inventors: Paul Koltai, Georg Robert