Patents by Inventor Claus-Rudiger Bernert

Claus-Rudiger Bernert 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: 4507473
    Abstract: A continuous process for the granulation of alcohol- and water-moist carboxymethyl cellulose (CM) produced by standard methods, wherein the CMC still moist with adhering aqueous alcohol is continuously introduced into a stirring unit, of which the length-to-diameter ratio is greater than 1 and of which the radial stirring elements are mounted on a shaft extending longitudinally in the stirring unit, and is taken up by the stirring elements, which rotate at a peripheral speed of at least 2 m/sec, being percussively size-reduced, and at the same time is brought into contact with steam flowing in countercurrent, and after a residence time of at least 1 minute, is discharged from the stirring unit and dried in the usual way.
    Type: Grant
    Filed: March 8, 1984
    Date of Patent: March 26, 1985
    Assignee: Wolff Walsrode Aktiengesellschaft
    Inventors: Claus-Rudiger Bernert, Hans-Gert Kirchner, Reinhard Nader
  • Patent number: 4404370
    Abstract: A process for the purification and isolation of cellulose or starch ethers wherein directly after the etherification step the suspension agent and the extraction of the ether product with the purifying agent is carried out on the same continuously working filter.
    Type: Grant
    Filed: November 23, 1980
    Date of Patent: September 13, 1983
    Assignee: Wolff Walsrode AG and Bayer AG
    Inventors: Claus-Rudiger Bernert, Volker Hartwig, Christian Kords, Detmar Redeker
  • Patent number: 4398024
    Abstract: A process for purification and working-up of cellulose or starch ethers using a solid-jacket sieve centrifuge for removing the suspension agent extraction with purifying agent and isolation of the purified ether product.
    Type: Grant
    Filed: November 13, 1981
    Date of Patent: August 9, 1983
    Assignees: Wolff Walsrode Aktiengesellschaft, Bayer Aktiengesellschaft
    Inventors: Claus-Rudiger Bernert, Christian Kords, Detmar Redeker
  • Patent number: 4163088
    Abstract: The invention relates to antistatic polyamide compositions comprising a polyamide and as an antistatic agent from 0.1 to 20%, preferably from 1.5 to 15%, by weight based on the total weight of the composition of urethanes with ether groups. The urethanes with ether groups are stable in melts of aliphatic polyamides for prolonged periods at temperatures of up to about 300.degree. C. and filaments and fibers of such polyamides or woven fabrics, knitted fabrics, non-woven or pile fabrics produced from these filaments or fibers show outstanding antistatic properties.
    Type: Grant
    Filed: June 20, 1977
    Date of Patent: July 31, 1979
    Assignee: Bayer Aktiengesellschaft
    Inventors: Hans E. Kunzel, Claus-Rudiger Bernert, Gunter Arend, Francis Bentz, Helmut Sinner, Dieter Brokmeier
  • Patent number: 4042570
    Abstract: High molecular weight polyesters from terephthalic acid and 1,4 cyclohexane dimethanol, containing in polycondensed form a polytetrahydrofurane diol Fibers and filaments produced from these polyesters can be dyed carrier-free.
    Type: Grant
    Filed: August 26, 1975
    Date of Patent: August 16, 1977
    Assignee: Bayer Aktiengesellschaft
    Inventors: Claus-Rudiger Bernert, Eduard Radlmann, Gunther Nischk
  • Patent number: 3962176
    Abstract: This invention relates to antistatic compositions of high molecular weight linear aliphatic polyamides which are stabilized against yellowing due to the action of heat. These polyamides which may be formed into films or fibers, are prepared by the solvent-free condensation of salts of aliphatic diamines with aliphatic dicarboxylic acids and/or lactams and contain homogeneously distributed therein a composition of one or more polyoxyalkylene compounds and tertiary amides or diamides, having at least one tertiary amide group.
    Type: Grant
    Filed: May 16, 1974
    Date of Patent: June 8, 1976
    Assignee: Bayer Aktiengesellschaft
    Inventors: Claus-Rudiger Bernert, Eduard Radlmann