Patents by Inventor Axel Woschina

Axel Woschina 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 production of E-1-?4'- (2- Dimethylaminoethoxy) - Phenyl!-1-(3-Hydroxyphenyl) -2-Phenyl-1-Butene
    Patent number: 5693863
    Abstract: The present invention relates to methods for the production of E-1-?4'-(2-dimethylaminoethoxy)-phenyl!-1-(3'-hydroxyphenyl)-2-phenyl-1-bu tene of formula (I) which comprises heating the compound of formula (II) in the presence of an organic solvent and HCl gas and cooling the reaction to obtain the compound of formula (IIIa), and then heating the isolated compound of formula (IIIa) in the presence of sulfuric acid or hydrochloric acid to obtain the compound according to formula (I).
    Type: Grant
    Filed: September 23, 1996
    Date of Patent: December 2, 1997
    Assignee: Klinge Pharma GmbH
    Inventors: Helmut Grill, Axel Woschina
  • Lifibrol and its use
    Patent number: 5493051
    Abstract: A new modification of Lifibrol is described with a melting point of 132.degree. C.-138.degree. C. particularly from 134.degree. C.-136.degree. C. and a primary peak in an IR spectrum at a wave number of 3,200-3,400, preferably 3,250-3,350. The new modification of Lifibrol (modification II) is distinguished in that it allows for good crystallization and, therefore, can be formulated without problems on a large industrial scale for tablets of acceptable size and high stability.
    Type: Grant
    Filed: April 29, 1994
    Date of Patent: February 20, 1996
    Assignee: Klinge Pharma GmbH
    Inventors: Artur Burger, Anita Lettenbichler, Fritz Stanislaus, Arnim Laicher, Karl Schwitzer, Axel Woschina
  • Process for the preparation of trans-1,1,2-triphenyl-but-1-ene derivatives
    Patent number: 4960937
    Abstract: The invention concerns the direct preparation of trans-1,1,2-triphenyl-but-1-ene derivatives having the general formula 1 by dehydration of carbinols having the general formula 2 by heating in a strongly hydrochloric or sulphuric acid medium with the exclusion of organic solvents.
    Type: Grant
    Filed: October 27, 1988
    Date of Patent: October 2, 1990
    Assignee: Klinge Pharma GmbH
    Inventors: Axel Woschina, Helmut Grill