Patents by Inventor Ernst Berg

Ernst Berg 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).

  • Bielastic, warp-knit fabric and its production
    Patent number: 4909049
    Abstract: A bielastic warp-knit fabric with balanced behavior of the elastic forces in the longitudinal and transverse directions is obtained by guiding elasthane yarn as weft thread under the needle points in the tuck or laying position during the stitch-forming process, so that loops are formed during knocking-over.
    Type: Grant
    Filed: November 29, 1988
    Date of Patent: March 20, 1990
    Assignee: Bayer Aktiengesellschaft
    Inventors: Harald Baesgen, Helmut Schillings, Ernst Berg
  • Bielastic, warp-knit fabric and its production
    Patent number: 4817400
    Abstract: A bielastic warp-knit fabric with balanced behavior of the elastic forces in the longitudinal and transverse directions is obtained by guiding elasthane yarn as weft thread under the needle points in the tuck or laying position during the stitch-forming process, so that loops are formed during knocking-over.
    Type: Grant
    Filed: August 21, 1987
    Date of Patent: April 4, 1989
    Assignee: Bayer Aktiengesellschaft
    Inventors: Harald Baesgen, Helmut Schillings, Ernst Berg
  • Process for producing extractive-material-reduced cellulose
    Patent number: 4814440
    Abstract: The invention relates to a process for obtaining extractive-material-reduced cellulose with a low LAL reaction, wherein cotton linters or wood pulps, subsequent to the customary digesting treatment, are subjected for 1 to 10 hours to hydraulic washing with water, lye with a concentration of less than 5 g/l alkali content, or with a diluted acid containing less than 5 g/l acid at temperatures of 120.degree. to 180.degree. C. and under a pressure of 2 to 20 bar.The resulting cellulose is used for the manufacture of hemodialysis and/or hemofiltration membranes in the form of flat membranes, tubular membranes or hollow filaments by regeneration of a cellulose solution containing the extractive-material-reduced cellulose with a low LAL reaction.The regeneration may be effected from solutions of cellulose cuoxam, cellulose xanthate, or solutions of cellulose in tertiary amine oxide or in an LiCl-containing solvent.
    Type: Grant
    Filed: October 1, 1987
    Date of Patent: March 21, 1989
    Assignee: Akzo NV
    Inventors: Joachim Behnke, Helmut Schulze, Ernst Berg, Michael Pelger