Patents by Inventor Rudolf Rohrer

Rudolf Rohrer 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).

  • Patent number: 4568350
    Abstract: A process for dyeing silk or silk-containing fiber blends with reactive dyes, which comprises dyeing or impregnating said material with a reactive dye of the formulaD--Y].sub.nwherein D is the radical of a sulfo group containing dye of the mono- or polyazo, metal complex azo, anthraquinone, phthalocyanine, formazane, azomethine, dioxazine, phenazine, stilbene, triphenylmethane, xanthene, thioxanthone, nitroaryl, naphthoquinone, pyrenequinone or perylenetetracarbimide series, [Y].sub.n, where n is 1 to 4, denotes identical or different reactive radicals Y, in aqueous medium at a pH value above 8, without the addition of a dispersant or swelling agent, and in the temperature range from 20.degree. to 40.degree. C. for 6 to 48 hours, and storing the impregnated goods in the moist state for 6 to 48 hours at a temperature from 20.degree. to 60.degree. C.Dyeings with good fastness properties are obtained with this process.
    Type: Grant
    Filed: April 16, 1984
    Date of Patent: February 4, 1986
    Assignee: Ciba-Geigy Corporation
    Inventor: Rudolf Rohrer
  • Patent number: 4560388
    Abstract: A process for dyeing or printing silk or silk-containing fibre blends with reactive dyes, which comprises the use of a reactive dye of the formulaD--Y].sub.n (1),wherein D is the radical of a sulfo group containing dye of the mono- or polyazo, metal complex azo, anthraquinone, phthalocyanine, formazan, azomethine, dioxazine, phenazine, stilbene, triphenylmethane, xanthene, thioxanthone, nitroaryl, naphthoquinone, pyrenequinone or perylenetetracarbimide series, [Y].sub.n, where n is 1 to 4, denotes identical or different reactive radicals Y, except reactive dyes of the formula (1), wherein n is 1 and Y is a chloroacetyl, .alpha.-bromoacryloyl, .alpha.,.beta.-dibromopropionyl, aminochloro-s-triazinyl, C.sub.1 -C.sub.4 alkoxychloro-s-triazinyl or C.sub.1 -C.sub.4 alkoxy-C.sub.1 -C.sub.4 alkoxychloro-s-triazinyl radical, and [Y].sub.2 denotes two identical chloroacetyl, .alpha.-bromoacryloyl or .alpha.,.beta.-dibromopropionyl radicals, in aqueous medium at a temperature in the range from 50.degree. to 130.degree.
    Type: Grant
    Filed: April 11, 1984
    Date of Patent: December 24, 1985
    Assignee: Ciba-Geigy Corporation
    Inventor: Rudolf Rohrer