Patents by Inventor Edgar Leitz

Edgar Leitz 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).

  • Thermoplastic moulding compositions of the ABS type of improved toughness and processability
    Patent number: 4906688
    Abstract: Thermoplastic moulding compounds containing(A) from 5-90 parts by weight of one or more thermoplastic polymers,(B) from 5-90 parts by weight of one or more graft polymers and(C) from 0.25-40 parts by weight of a linear aliphatic polycarbonate.
    Type: Grant
    Filed: March 6, 1989
    Date of Patent: March 6, 1990
    Assignee: Bayer Aktiengesellschaft
    Inventors: Herbert Fichenauer, Edgar Leitz, Karl-Heinz Ott, Alfred Pischtschan
  • Thermoplastic molding compounds containing special copolymers
    Patent number: 4900785
    Abstract: The invention relates to thermoplastic molding compounds containing1. thermoplastic aromatic polycarbonates and/or thermoplastic aromatic polyesters,2. graft polymers,3. special copolymers corresponding to formula (Ia)[A-X-B].sub.r (Ia)and, optionally,2a. thermoplastic copolymers, stabilizers, pigments, mold release agents, flameproofing agents and/or antistatic agents.The invention also relates to a process for the production of the molding compounds.
    Type: Grant
    Filed: March 6, 1989
    Date of Patent: February 13, 1990
    Assignee: Bayer Aktiengesellschaft
    Inventors: Edgar Leitz, Herbert Eichenauer, Karl-Heinz Ott, Horst Peters, Jochen Schoeps
  • Thermoplastic polycarbonate mixtures containing aliphatic
    Patent number: 4900797
    Abstract: The invention relates to thermoplastic polycarbonate mixtures containing aromatic polycarbonates and aliphatic polycarbonates and, optionally, stabilizers, pigments, mold release agents, flameproofing agents and/or antistatic agents. The invention also relates to a process for the production of the polycarbonate mixtures.
    Type: Grant
    Filed: March 6, 1989
    Date of Patent: February 13, 1990
    Assignee: Bayer Aktiengesellschaft
    Inventors: Edgar Leitz, Herbert Eichenauer, Karl-Heinz Ott
  • Moulding compounds of aromatic polyesters and grafted silicone rubber
    Patent number: 4882381
    Abstract: Moulding compounds prepared from fully aromatic polyesters and grafted silicone rubber of a specified composition can be worked up into moulded bodies with excellent low temperature toughness and uniform surface.
    Type: Grant
    Filed: July 26, 1988
    Date of Patent: November 21, 1989
    Assignee: Bayer Aktiengesellschaft
    Inventors: Dieter Wittmann, Hans-Jurgen Kress, Ludwig Bottenbruch, Edgar Leitz, Horst Peters
  • Thermoplastic moulding compositions of polycarbonate and terpolymers
    Patent number: 4774289
    Abstract: Thermoplastic moulding compositions containing:A. 1-99 parts by weight of an aromatic thermoplastic polycarbonate or several aromatic thermoplastic polycarbonates andB. 1-99 parts by weight of a thermoplastic compolymer of 30-40 parts by weight of .alpha.-methylstyrene, 50-60 parts by weight of methyl methacrylate and 5-15 parts by weight of acrylonitrile.
    Type: Grant
    Filed: July 20, 1987
    Date of Patent: September 27, 1988
    Assignee: Bayer Aktiengesellschaft
    Inventors: Hans-Jurgen Kress, Christian Lindner, Leo Morbitzer, Horst Peters, Jochen Schoeps, Edgar Leitz
  • Process for the preparation of linear aliphatic polycarbonate from cyclic aliphatic carbonate
    Patent number: 4754017
    Abstract: Process for the polymerization of cyclic aliphatic carbonates in the presence of aprotic organic solvents with exclusion of atmospheric oxygen and atmospheric moisture, wherein organometallic compounds of elements of main group 1 of the periodic table are used as initiators, the monomer/solvent ratio is in the range from 1 part by weight to 50 parts by weight of monomer per 100 parts by weight of solvent and the polymerization temperature is between -100.degree. C. and +20.degree. C.
    Type: Grant
    Filed: February 24, 1987
    Date of Patent: June 28, 1988
    Assignee: Bayer Aktiengesellschaft
    Inventors: Edgar Leitz, Christian Lindner, Herbert Eichenauer, Karl-Heinz Ott, Hans-Josef Buysch, Peter Mues, Hartwig Hocker, Helmut Keul