Patents by Inventor Achim Wiedemann

Achim Wiedemann 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).

  • Surface active compositions their production and use
    Patent number: 5259963
    Abstract: Compositions containing the components (a), (b) and (c) and optionally (d) and/or (e) are eminently suitable as foam inhibiting and deaerating compositions with wetting properties and as wetting assistants for the treatment of corresponding substrates in particular for the pretreatment of textile material from aqueous medium and in the presence of typical wetting agents.
    Type: Grant
    Filed: October 25, 1991
    Date of Patent: November 9, 1993
    Assignee: Sandoz Ltd.
    Inventor: Achim Wiedemann
  • Concentrated compositions and their use as stabilizers for peroxide-containing alkaline liquors
    Patent number: 5000874
    Abstract: Concentrated aqueous compositions containing(a) a hydroxy- or amino-alkanephosphonic acid(b) a polyaminocarboxylic acid(c) glucoheptonic acid and optionally(d) magnesium chloride, -sulfate and/or -acetateare eminently suitable as stabilizing additives for peroxide-containing alkaline liquors which are employed in the bleach of cellulosic fibrous material.
    Type: Grant
    Filed: June 24, 1988
    Date of Patent: March 19, 1991
    Assignee: Sandoz Ltd.
    Inventor: Achim Wiedemann
  • Organic compounds
    Patent number: 4889945
    Abstract: The invention relates to phosphoric acid partial esters derived from a block ethoxylated and propoxylated C.sub.9-16 aliphatic alcohol. These phosphoric acid partial esters are useful as wetting agents, especially in the pre-treatment of cellulosic textile materials.
    Type: Grant
    Filed: April 6, 1989
    Date of Patent: December 26, 1989
    Assignee: Sandoz Ltd.
    Inventor: Achim Wiedemann
  • Polyoxyalkylene-containing phosphoric acid esters
    Patent number: 4830764
    Abstract: The invention relates to phosphoric acid partial esters derived from a block ethoxylated and propoxylated C.sub.9-16 aliphatic alcohol. These phosphoric acid partial esters are useful as wetting agents, especially in the pre-treatment of cellulosic textile materials.
    Type: Grant
    Filed: October 23, 1987
    Date of Patent: May 16, 1989
    Assignee: Sandoz Ltd.
    Inventor: Achim Wiedemann
  • Disperse dyeing of polyester with benzalketo derivatives as carriers: benzalacetone, methyl cinnamate etc.
    Patent number: 4229172
    Abstract: Polyester or polyester blend textile material is dyed with a disperse dyestuff in the presence of a benzalketo derivative as a dyeing carrier.
    Type: Grant
    Filed: February 21, 1978
    Date of Patent: October 21, 1980
    Assignee: Sandoz Ltd.
    Inventors: Hans-Peter Baumann, Hans-Georg Karmann, Achim Wiedemann
  • Improved optical brightening of polyamides
    Patent number: 4169702
    Abstract: Disclosed is an optical brightening process for substrates comprising or consisting of synthetic polyamide in which the optical brightener is applied to the substrate by impregnation followed by heat treatment and wherein the brightener is applied in the presence of a compound or mixture of compounds of formula I,rnh.sub.2 iwherein R is --OH, --NR.sub.1 R.sub.2 or ##STR1## X being O, S or NH, and R.sub.1 and R.sub.2 being, independently, hydrogen, C.sub.1-6 alkyl or C.sub.2-4 hydroxyalkyl,Which compounds are in free base or acid addition salt form or, when R is OH, in O-sulphonic acid form, and preparations for use in such process.
    Type: Grant
    Filed: February 7, 1977
    Date of Patent: October 2, 1979
    Assignee: Sandoz Ltd.
    Inventors: Fritz Fleck, Emmanuel Hervot, Peter Merk, Horst Schmid, Achim Wiedemann
  • Polyglycol ether derivatives
    Patent number: 4115457
    Abstract: The invention provides novel polyglycol ethers of formula I,r--c.sub.2 h.sub.4 o).sub.x --C.sub.3 H.sub.6 O.sub.y --C.sub.2 H.sub.4 O).sub.z --H-- Iin which R is alkoxy of 8 to 24 carbon atoms,X has a value of 9 to 10Y has a value of 12 to 17AndZ has a value of 8 to 12.The new compounds have a number of uses in the dyeing and printing industries, for example as scouring and washing agents.
    Type: Grant
    Filed: April 7, 1977
    Date of Patent: September 19, 1978
    Assignee: Sandoz Ltd.
    Inventor: Achim Wiedemann