Patents by Inventor Manfred Döring

Manfred Döring 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 9, 10-dihydro-9-OXA-10-organyloxyphosphaphenanthrene-10-oxide or -thione and derivatives of the same substituted on the phenyl groups
    Patent number: 7317119
    Abstract: A process is provided for the preparation of 9,10-dihydro-9-oxa-10-organyloxyphosphaphenanthrene-10-oxide or -thione and derivatives of same substituted on the phenyl groups, in which: (a) 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide (DOP) or a derivative of same is reacted in the presence of at least one mono- or polyhydric alcohol with at least one ortho ester with formation of a first intermediate product, (b) the intermediate product from step (a) is optionally reacted with at least one further mono- or polyhydric alcohol with formation of a further intermediate product and (c) the intermediate product from steps (a) or (b) is transformed by addition of oxidation agent into 9,10-dihydro-9-oxa-10-organyloxyphosphaphenanthrene-10-oxide or -thione or a derivative of same substituted on the phenyl groups.
    Type: Grant
    Filed: August 13, 2004
    Date of Patent: January 8, 2008
    Assignee: Schill & Seilacher “Struktol” AG
    Inventors: Uwe Dittrich, Berthold Just, Manfred Döring, Michael Ciesielski
  • Method for producing 6-alkoxy-(6H)-dibenz [c,e] [1,2]-oxaphosphorines
    Patent number: 7115765
    Abstract: The present invention relates to a process for preparing 6-alkoxy-(6H)-dibenzo[c,e][1,2]oxaphosphorins, wherein 6H-dibenzo[c,e][1,2]oxaphosphorin 6-oxides of the formula I are used as the reactant.
    Type: Grant
    Filed: February 12, 2003
    Date of Patent: October 3, 2006
    Assignee: Forschungszentrum Karlsruhe GmbH
    Inventors: Stephan Sprenger, Michael Ciesielski, Carsten Kollann, Manfred Döring