Patents by Inventor Nobert Schweickert

Nobert Schweickert 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).

  • Chroman derivatives
    Patent number: 6646136
    Abstract: Chroman derivatives of the formula I in which R1 is acyl having 1-6 C atoms, —CO—R5 or an amino protective group, R2 is H or alkyl having 1-6 C atoms, R3, R4 in each case independently of one another are H, alkyl having 1-6 C atoms, CN, Hal or COOR2, R5 is phenyl which is unsubstituted or mono- or disubstituted by alkyl having 1-6 C atoms, OR2 or Hal, X is H, H or O, Hal is F, Cl, Br or I, and their salts, are suitable as intermediates in the synthesis of medicaments.
    Type: Grant
    Filed: February 28, 2002
    Date of Patent: November 11, 2003
    Assignee: Merck Patent GmbH
    Inventors: Heinz-Herman Bokel, Peter Mackert, Christoph Müramann, Nobert Schweickert