Patents by Inventor Bernd Lehmann

Bernd Lehmann 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).

  • Process for the production of caboxylic acid cyanides
    Patent number: 4339591
    Abstract: There are produced carboxylic acid cyanides, e.g., acyl cyanides by reacting a carboxylic acid halide with an alkali cyanide or hydrogen cyanide in the presence of a copper (I) salt and a carboxylic acid nitrile. Especially advantageous are glutaric acid dinitrile and 2-methyl glutaric acid dinitrile.
    Type: Grant
    Filed: March 23, 1981
    Date of Patent: July 13, 1982
    Assignee: Degussa Aktiengesellschaft
    Inventors: Axel Kleemann, Bernd Lehmann, Herbert Klenk
  • Process for applying a layer of a liquid foamable reaction mixture to a continuously moving shaping support
    Patent number: 4216181
    Abstract: A method for the continuous production of foam blocks or foam sandwich panels involving the application of the liquid foamable reaction mixture to the continuously moving shaping support in a manner which avoids large gas inclusions in the final product produced. The liquid foamable reaction mixture is preliminarily distributed by the use of a particular distributor channel means in a traverse direction to the continuously moving shaping support, permitted to flow in the form of a descending film exposed to the atmosphere to an intermediate storage means and then conveyed to said continuously moving shaping support. The distributor channel means may also be pivoted to control the outflow of the mixture.
    Type: Grant
    Filed: April 23, 1979
    Date of Patent: August 5, 1980
    Assignee: Bayer Aktiengesellschaft
    Inventors: Wilfried Ebeling, Volker Onnenberg, Alberto C. Gonzalez-Dorner, Bernd Lehmann, Hansjurgen Rabe, Klaus Schulte
  • Apparatus for applying a layer of a liquid foamable reaction mixture to a continuously moving support
    Patent number: 4165211
    Abstract: The instant invention relates to a process and an apparatus for applying a layer of liquid, foamable reaction mixture to a continuously moving support, such as for the production of foam blocks or foam sandwich panels having a thick foam core.
    Type: Grant
    Filed: July 1, 1977
    Date of Patent: August 21, 1979
    Assignee: Bayer Aktiengesellschaft
    Inventors: Wilfried Ebeling, Volker Onnenberg, Alberto C. Gonzalez-Dorner, Bernd Lehmann, Hansjurgen Rabe, Klaus Schulte