Patents by Inventor Guenter Muerdel

Guenter Muerdel 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).

  • Method for the resolution of folinic acid
    Patent number: 5010194
    Abstract: A method for the resolution of (6R,S)-folinates into their diastereomers, comprising adding a water-soluble alkali metal, ammonium or alkaline earth metal salt of an inorganic or organic acid to an aqueous solution of a salt of (6R,S)-folinic acid, removing by filtration the salt which separates out, which consists predominantly of the corresponding (6R)-folinates, and isolating the desired (6S)-folinate from the filtrate.
    Type: Grant
    Filed: November 7, 1989
    Date of Patent: April 23, 1991
    Assignee: Eprova AG
    Inventors: Hans R. Mueller, Martin Ulmann, Josef Conti, Guenter Muerdel