Patents by Inventor Birger Knickel

Birger Knickel 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).

  • Mineral building materials with additives
    Patent number: 5348582
    Abstract: The invention relates to mineral building materials which contain binders, optionally aggregates and at least one additive, characterized in that the additives used are compounds which are condensation products of substituted or unsubstituted diphenyl sulphones, formaldehyde and compounds from the group consisting of mononuclear or polynuclear, substituted or unsubstituted aromatic compounds, acid amides, urea, urea derivatives, substituted or unsubstituted aromatic ethers and imines.
    Type: Grant
    Filed: May 20, 1993
    Date of Patent: September 20, 1994
    Assignee: Bayer AG
    Inventors: Joachim Herzig, Kurt Bredtmann, Birger Knickel, Cornelia Dorzbach-Lange
  • Asymmetric, semipermeable membranes of cyclic polyureas
    Patent number: 4045337
    Abstract: Asymmetric, semipermeable membranes of polyhydantoins or polyparabanates.
    Type: Grant
    Filed: June 24, 1975
    Date of Patent: August 30, 1977
    Assignee: Bayer Aktiengesellschaft
    Inventors: Birger Knickel, Hans Rudolph, Jurgen Hocker, Jurgen Lewalter, Hans Jurgen Rosenkranz
  • Asymmetric, semipermeable membranes of polybenz-1,3-oxazine diones-(2,4)
    Patent number: 4036748
    Abstract: An asymmetric semipermeable membrane of a homo- or co-polybenz-1,3-oxazine dione-(2,4).
    Type: Grant
    Filed: April 16, 1975
    Date of Patent: July 19, 1977
    Assignee: Bayer Aktiengesellschaft
    Inventors: Birger Knickel, Rudolf Binsack, Hans Rudolph, Hans Jurgen Rosenkranz, Ludwig Bottenbruch
  • Modified chromium oxide pigment
    Patent number: 3960590
    Abstract: Chromium oxide pigments intimately admixed with an alkoxylated alkyl sulphonamide to obtain a pigment having a low degree of flocculation.
    Type: Grant
    Filed: November 14, 1974
    Date of Patent: June 1, 1976
    Assignee: Bayer Aktiengesellschaft
    Inventors: Birger Knickel, Siegfried Keifer, Hermann Perrey, Hans Rudolph, Hans Jurgen Rosenkranz, Reinhold Rudisch