Patents by Inventor Manfred Josef Bergfeld

Manfred Josef Bergfeld 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: 6583231
    Abstract: The invention relates to a process to make aminated polyolefins involving the steps of: ozonolysis of one or more low-molecular weight polyolefins with at least one end group that is unsaturated, in the presence of an alkanol-hydrocarbon mixture, to form polyolefin-alkoxyhydroperoxides, catalytic reduction of the polyolefin-alkoxyhydroperoxides with hydrogen and a suitable catalyst, to form a mixture of hemiacetals and hemiketals, in the presence of a solvent, removal of the catalyst and optional washing of the mixture resulting from step 2, to remove undesired side products, reductive amination of the hemiacetal hemiketal mixture to form the aminated polyolefin end product, preferably at a temperature of 50-200° C., optionally in the presence of a solvent, and removal of the catalyst and optional removal of the solvent. The aminated products obtained are pre-eminently suited for use as an adjuvant in oils and fuels.
    Type: Grant
    Filed: January 23, 2001
    Date of Patent: June 24, 2003
    Assignee: Akzo Nobel N.V.
    Inventors: Klaus Ihrig, Manfred Josef Bergfeld, Ulrich Wecker
  • Patent number: 6320084
    Abstract: The invention pertains to a process for the preparation of glyceraldehyde, or an acetal or a hemiacetal thereof, characterized in that 3-butene-1,2-diol is dissolved in a lower alkanol and is subjected to ozonolysis to obtain a 3-hydroperoxy-3-alkoxy-propane-1,2-diol, which is subjected to a reductive treatment to obtain a hemiacetal of glyceraldehyde, which optionally may be converted into glyceraldehyde or an acetal or hemiacetal thereof, and to a process wherein the hemiacetal of glyceraldehyde is converted to a 3-aminopropane-1,2-diol derivative, by subjecting the hemiacetal of glyceraldehyde to a reductive treatment in the presence of ammonia or a primary or secondary amine.
    Type: Grant
    Filed: February 26, 2001
    Date of Patent: November 20, 2001
    Assignee: Akzo Nobel NV
    Inventors: Ulrich Wecker, Manfred Josef Bergfeld
  • Publication number: 20010027239
    Abstract: The invention relates to a process to make aminated polyolefins involving the steps of:
    Type: Application
    Filed: January 23, 2001
    Publication date: October 4, 2001
    Inventors: Klaus Ihrig, Manfred Josef Bergfeld, Ulrich Wecker
  • Publication number: 20010025124
    Abstract: The invention pertains to a process for the preparation of glyceraldehyde, or an acetal or a hemiacetal thereof, characterized in that 3-butene-1,2-diol is dissolved in a lower alkanol and is subjected to ozonolysis to obtain a 3-hydroperoxy-3-alkoxy-propane-1,2-diol, which is subjected to a reductive treatment to obtain a hemiacetal of glyceraldehyde, which optionally may be converted into glyceraldehyde or an acetal or hemiacetal thereof, and to a process wherein the hemiacetal of glyceraldehyde is converted to a 3-aminopropane-1,2-diol derivative, by subjecting the hemiacetal of glyceraldehyde to a reductive treatment in the presence of ammonia or a primary or secondary amine.
    Type: Application
    Filed: February 26, 2001
    Publication date: September 27, 2001
    Inventors: Ulrich Wecker, Manfred Josef Bergfeld