Patents by Inventor Helfried Neumann

Helfried Neumann 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 N-acylamino acids
    Patent number: 6294681
    Abstract: The present invention provides a process for producing N-acyl-protected amino acids with the general formula I by amidocarbonylation whereby carbon monoxide, an amide/nitrile and an aldehyde, are reacted in the presence of a metal catalysts such as rhodium, iridium or ruthenium catalysts.
    Type: Grant
    Filed: June 26, 2000
    Date of Patent: September 25, 2001
    Assignee: Degussa-Huels AG
    Inventors: Karlheinz Drauz, Olaf Burkhardt, Matthias Beller, Markus Eckert, Wahed Moradi, Helfried Neumann