Patents by Inventor Karl Wieghardt

Karl Wieghardt 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).

  • Ligand and complex for catalytically bleaching a substrate
    Patent number: 6646122
    Abstract: The invention relates to ligands or complexes useful as catalysts for catalytically bleaching substrates with atmospheric oxygen, and as catalysts in the of treatment of textiles such as laundry fabrics whereby bleaching by atmospheric oxygen is catalysed after the treatment.
    Type: Grant
    Filed: February 28, 2001
    Date of Patent: November 11, 2003
    Assignee: Unilever Home & Personal Care USA, division of Conopco, Inc.
    Inventors: Daniela Nuhlen, Thomas Weyhermuller, Karl Wieghardt
  • Composition and method for bleaching a substrate
    Patent number: 6610641
    Abstract: The invention relates to catalytically bleaching substrates, especially laundry fabrics, with a bleaching composition and a peroxyl source.
    Type: Grant
    Filed: February 28, 2001
    Date of Patent: August 26, 2003
    Assignee: Unilever Home & Personal Care USA, division of Conopco, Inc.
    Inventors: Ronald Hage, Daniela Nühlen, Thomas Weyhermüller, Karl Wieghardt
  • Composition and method for bleaching a substrate
    Publication number: 20020010120
    Abstract: The invention relates to catalytically bleaching substrates, especially laundry fabrics, with a bleaching composition and a peroxyl source.
    Type: Application
    Filed: February 28, 2001
    Publication date: January 24, 2002
    Applicant: Unilever Home & Personal Care USA, Division of Conopco, Inc.
    Inventors: Ronald Hage, Daniela Nuhlen, Thomas Weyhermuller, Karl Wieghardt
  • METHOD FOR THE DELIGNIFICATION OF FIBROUS MATERIAL AND USE OF CATALYST
    Publication number: 20010025695
    Abstract: The invention refers to a method to delignify fibrous material comprising an aqueous suspension of fibers which has a consistency between 5%-40%, with a peroxy compound that is used in amounts between 0.
    Type: Application
    Filed: May 28, 1999
    Publication date: October 4, 2001
    Inventors: RUDOLF PATT, HANS-JURGEN MIELISCH, JURGEN ODERMATT, KARL WIEGHARDT, THOMAS WEYERMULLER
  • 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