Patents by Inventor Siegfried Pauluhn

Siegfried Pauluhn 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 preparation of pure flupirtine maleate and its A modification
    Patent number: 5959115
    Abstract: A process for preparation of pure flupertine maleate and the pure A crystalline form of flupertine maleate by the use of water soluble alcohols during synthesis and/or purification.
    Type: Grant
    Filed: April 23, 1998
    Date of Patent: September 28, 1999
    Assignee: ASTA Medica Aktiengesellschaft
    Inventors: Alfred Olbrich, Peter Emig, Bernhard Kutscher, Karl-Friedrich Landgraf, Siegfried Pauluhn, Hans Stange
  • 2-Amino-3-carbethoxyamino-6-(p-fluoro-benzylamino)-pyridine-maleate
    Patent number: 4481205
    Abstract: There is prepared 2-amino-3-carbethoxyamino-6-(p-fluoro-benzylamino)-pyridine-maleate of the formula ##STR1## The compound has antiphlogistic and analgesic properties in the same manner as the known hydrochloride salt. In contrast to the hydrochloride 2-amino-3-carbethoxyamino-6-(p-fluoro-benzylamino)-pyridine-maleate can be produced without a disturbing blue coloration. This maleate generally is formed from a mixture of two crystal modifications A and B, whereby there is especial advantageous in regard to isolation as well as the galenical preparations a mixture entriched in modification A (60 to 90% modification A).
    Type: Grant
    Filed: September 2, 1981
    Date of Patent: November 6, 1984
    Assignee: Degussa Aktiengesellschaft
    Inventors: Walter von Bebenburg, deceased, Siegfried Pauluhn