Patents by Inventor Hebert Bader

Hebert Bader 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).

  • Microencapsulation of biologically active material
    Patent number: 5100673
    Abstract: Polyelectrolyte membrane capsules are composed of a semi-permeable membrane and an active material enclosed by it, the membrane being formed of a biocompatible, non-toxic polyacid and a polybase; the polybase is composed of repeating monomer units of the formula (I) ##STR1## in which R.sup.1 and R.sup.2 have the indicated meanings.
    Type: Grant
    Filed: February 21, 1990
    Date of Patent: March 31, 1992
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Hebert Bader, Karl-Heinz Keil, Diether Ruppel, Merten Schlingmann, Axel Walch