Patents by Inventor Michael Romer

Michael Romer 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 azidobenzal compounds
    Patent number: 4354976
    Abstract: A process for preparing a 2,6-bis-[(4-azidophenyl)methylene]-cyclohexanone of the formula ##STR1## wherein R is hydrogen or alkyl of 1-6 C atoms, comprises condensing a cyclohexanone of the formula ##STR2## wherein R is as defined above, with 4-aminobenzaldehyde, the 4-amino group optionally being protected, in the presence of an alkaline condensing agent; removing the protective group when the 4-amino group is protected; diazotizing the resultant 2,6-bis-[(4-aminophenyl)methylene]-cyclohexanone of the formula ##STR3## wherein R is as defined above, and reacting the diazotization product with an alkali metal azide.
    Type: Grant
    Filed: December 19, 1980
    Date of Patent: October 19, 1982
    Assignee: Merck Patent Gesellschaft mit Beschrankter Haftung
    Inventor: Michael Romer
  • Liquid crystalline, partially hydrogenated oligo-1,4-phenylenes and dielectrics and electro-optical display elements containing them
    Patent number: 4331552
    Abstract: Partially hydrogenated oligo-1,4-phenylenes of the formula ##STR1## wherein n is 1 or 2, the rings A and B are identical or different and are trans-4-alkylcyclohexyl or 4-alkylcyclohex-1-enyl, and the alkyl groups in each case are of up to 10 carbon atoms, have valuable liquid crystalline properties.
    Type: Grant
    Filed: December 5, 1980
    Date of Patent: May 25, 1982
    Assignee: Merck Patent Gesellschaft mit beschrankter Haftung
    Inventors: Rudolf Eidenschink, Ludwig Pohl, Michael Romer, Fernando del Pino