Patents by Inventor Phalguni Chaudhuri

Phalguni Chaudhuri 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).

  • Cu.sup.II and Zn.sup.II phenoxyl complexes and radical complexes thereof, methods for their preparation and use
    Patent number: 6153779
    Abstract: Quadridentate Cu.sup.II and Zn.sup.II phenoxyl complexes and phenoxyl radical complexes thereof, in which one ligand L is bonded to each metal atom and H.sub.2 L stands for the general formula ##STR1## in which the bridge-unit Q stands for --S--, --O--, --N(R.sup.3)--, --P(R.sup.4)--, or ortho-NH--C.sub.6 H.sub.4 --NH-- and R.sup.1 and R.sup.2 stand for radical-stabilizing residues.Preferred radical complexes include ##STR2## The radical complexes are oxidation catalysts for oxidizing organic substrates with O.sub.2 in the course of which H.sub.2 O.sub.2 is also formed.
    Type: Grant
    Filed: June 28, 1999
    Date of Patent: November 28, 2000
    Assignee: Degussa-Huls Aktiengesellschaft
    Inventors: Martina Hess, Phalguni Chaudhuri, Karl Wieghardt