Patents by Inventor Walter Knobel

Walter Knobel 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).

  • Composition and method for improving the fastness of direct and reactive dyeings on cellulose-containing substrates
    Patent number: 4443223
    Abstract: The fastness of direct dyes on cellulose substrates is improved by after-treatment with the reaction product of a quaternary polyalkylene polyamine with an N-methylol resin precursor, and heat curing in the presence of a catalyst. The unfixed portion of reactive dyes substantive to cellulose may also be given improved wet and light fastness by this treatment.
    Type: Grant
    Filed: August 30, 1982
    Date of Patent: April 17, 1984
    Assignee: Sandoz Ltd.
    Inventors: Bruno Kissling, Walter Knobel, Tibor Robinson
  • Reaction products useful for improving the wetfastness of direct and reactive dyes on cellulosic substrates
    Patent number: 4410652
    Abstract: The wet fastness of direct dyes on cellulose substrates is improved by after-treatment with the reaction product of an amine with cyanamide, dicyanodiamide, guanidine or biguanidine which is further reacted with an N-methylol resin precursor, and heat curing in the presence of a catalyst. The unfixed portion of reactive dyes substantive to cellulose may also be given improved wet fastness by this treatment, so that washing to remove unfixed reactive dye may not be necessary.
    Type: Grant
    Filed: February 9, 1982
    Date of Patent: October 18, 1983
    Assignee: Sandoz Ltd.
    Inventors: Tibor Robinson, Walter Knobel, Bruno Kissling
  • Process for reconcentrating moist glycol
    Patent number: 4314891
    Abstract: Reconcentration of moist glycol, which has been used to dry natural gas, by heating the moist glycol with flue gas from a reboiler and by thereafter stripping water from the moist glycol with the dried flue gas or with a hydrocarbon gas by-product of the natural gas being dried.
    Type: Grant
    Filed: November 25, 1980
    Date of Patent: February 9, 1982
    Assignee: Davy International AG
    Inventor: Walter Knobel
  • Process for reconcentrating moist glycol
    Patent number: 4273620
    Abstract: Reconcentration of moist glycol, which has been used to dry natural gas, by heating the moist glycol with flue gas from a reboiler and by thereafter stripping water from the moist glycol with the dried flue gas or with a hydrocarbon gas by-product of the natural gas being dried.
    Type: Grant
    Filed: June 26, 1978
    Date of Patent: June 16, 1981
    Assignee: Davy International AG
    Inventor: Walter Knobel
  • Process for dyeing mixed elastomeric and non-elastomeric fibers
    Patent number: 4247290
    Abstract: A process for dyeing textile substrates comprising a mixture of elastomeric and non-elastomeric fibres, in which in a first step the elastomeric fibre portion is dyed by a cold dwell process and then in a second the non-elastomeric fibre portion is dyed by a conventional exhaust or continuous process.
    Type: Grant
    Filed: March 30, 1979
    Date of Patent: January 27, 1981
    Assignee: Sandoz Ltd.
    Inventors: Walter Knobel, Karl Zeller