Patents by Inventor Ernest Felder

Ernest Felder 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).

  • Preparation of 5-acylamino-2,4,6-triiodo- or tribromo-benzoic acid derivatives
    Patent number: 5066823
    Abstract: A process for the preparation of 5-acylamino-2,4,6-triiodo or tribromo-benzoic acid derivatives of formula (I), wherein X is I or Br, R is H or a variously substituted alkyl, or a group of formula (II), wherein X has the above meanings; Y is hydroxy, alkoxy, hydroxyalkoxy, alkylamino or hydroxyalkylamino; Z may be the same as COY or it is hydroxylalkylaminocarbonyl provided that at least one of the two acyl or R groups is hydroxy-substituted, which process comprises the rearrangement of the corresponding 5-(alkylaminocarbonyl-alkoxy)-2,4,6-trioodo ro tribromo-benzoic acid derivatives, in the presence of bases.
    Type: Grant
    Filed: October 10, 1989
    Date of Patent: November 19, 1991
    Assignee: Bracco Industria Chemica S.p.A.
    Inventors: Ernest Felder, Carlo Musu, Luciano Fumagalli, Fulvio Uggeri