Patents Assigned to Gruenau Illertissen
  • Pipe seal with a sheet-metal casing bendable around a pipe
    Patent number: 5876042
    Abstract: A device for sealing the gap or void between the outer circumference of a pipe and a hole in a wall the pipe passes through includes a sheet metal casing flexible enough to be bent around the pipe. The inside wall of the casing includes spaced apart inner directed radial projections for containing a swelling agent that is heat activated for filling the void between the housing and pipe in a manner overlapping the gap between the pipe and the wall.
    Type: Grant
    Filed: November 3, 1997
    Date of Patent: March 2, 1999
    Assignee: Gruenau Illertissen GmbH
    Inventors: Robert Graf, Dieter Annemaier
  • Aqueous dispersions containing carboxylic acids and/or resinic acids for deinking printed wastepaper
    Patent number: 5725730
    Abstract: The invention relates to aqueous dispersions containing A. C.sub.6-22 carboxylic acids and/or resinic acids and B. C.sub.6-22 oxoalcohols alkoxylated with 2 to less than 6 mol C.sub.2-4 alkylene oxides for deinking printed wastepaper.
    Type: Grant
    Filed: October 24, 1994
    Date of Patent: March 10, 1998
    Assignee: Gruenau Illertissen
    Inventors: Heinz-Gerd Smolka, Klaus Lehmann, Hans Hawel, Dieter Schraml, Klaus Hornfeck
  • Disperant concentrate based on degradation products of polysaccharides in the dyeing of textiles
    Patent number: 5725605
    Abstract: A liquid dispersant concentrate stable against clouding at a temperature of 10.degree. C. to 35.degree. C. containing: (a) from 20% to 50% by weight of the degradation products of polysaccharides containing uronic acid units; and (b) the remainder, water, all weights being based on the weight of the concentrate.
    Type: Grant
    Filed: March 28, 1996
    Date of Patent: March 10, 1998
    Assignee: Gruenau Illertissen GmbG
    Inventors: Birgit Maunz, Dieter Hietsch, Joerg Schad
  • Process for the production of low-chromium protein hydrolyzates
    Patent number: 5602002
    Abstract: Described is the chemical hydrolysis of partial hydrolysates obtained by the enzymatic decomposition, in aqueous conditions in the presence of alkaline-earth oxides or hydroxides, of protein-containing raw materials containing chromium. This enables protein hydrolysates with a particularly low chromium content to be obtained which are stable to turbidity during storage. The chemical hydrolysis must be carried out in the presence of compounds selected from the alkaline-earth oxides and hydroxides, and within the critical pH range of 11 to 13.
    Type: Grant
    Filed: July 19, 1995
    Date of Patent: February 11, 1997
    Assignee: Gruenau Illertissen GmbH
    Inventors: Eberhard Eilers, Andreas Sander