Patents by Inventor Manfred F. Bergfeld

Manfred F. 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: 6159894
    Abstract: Catalyst for dehydrogenating amino alcohols to aminocarboxylic acids or ethylene glycol (derivatives) to oxycarboxylic acids, said catalyst containing zirconium, copper and possibly an additional metal, whereby the cited metals are precipitated as hydroxides, washed, dried, calcined, and reduced, preparable in that zirconium hydroxide is precipitated from an aqueous zirconium salt solution using a base until a pH of 4 to 10 is attained, the aqueous solution of a copper salt and possibly of an additional salt is added to the zirconium hydroxide suspension, and by adding further base copper hydroxide and possibly the hydroxide of the metal contained in the additional salt is precipitated until a pH of 8 to 14 is attained, the suspension obtained is filtered, washed, dried, calcined in air at 450 to 600.degree. C. for 2 to 4 hours and finally reduced at 200 to 250.degree. C. in a hydrogen stream for 2 to 4 hours.
    Type: Grant
    Filed: March 26, 1999
    Date of Patent: December 12, 2000
    Assignee: Akzo Nobel NV
    Inventors: Ludwig Eisenhuth, Manfred F. Bergfeld
  • Patent number: 4346233
    Abstract: This disclosure relates to a process for preparing long-chain hydrocarbon substituted ureas by reacting a long chain fatty acid N-chloramide in isopropanol and/or tertiary butanol with an aliphatic or araliphatic primary or secondary amine in the presence of an alkali or alkaline earth hydroxide at a temperature of from 20.degree. to 100.degree. C. The process of this disclosure is particularly useful in preparing long-chain hydrocarbon substituted ureas wherein one of the aliphatic hydrocarbon substituents contains one or more hydroxyl and/or carboxyl groups, as well as the salts of such substituted ureas.
    Type: Grant
    Filed: March 31, 1981
    Date of Patent: August 24, 1982
    Assignee: Akzona Incorporated
    Inventors: Hans G. Zengel, Manfred F. Bergfeld, Rainer Zielke