Patents by Inventor John Feldmann

John Feldmann 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).

  • Graft copolymers of monosaccharides, oligosaccharides, polysaccharides and modified polysaccharides, the preparation thereof, and their use
    Patent number: 5227446
    Abstract: Graft copolymers obtainable by free radical-initiated copolymerization of(A) a monomer mixture comprising(a) a monoethylenically unsaturated C.sub.4 - to C.sub.8 -dicarboxylic acid, or an anhydride, alkali metal salt or ammonium salt thereof,(b) a monoethylenically unsaturated C.sub.3 - to C.sub.
    Type: Grant
    Filed: February 1, 1991
    Date of Patent: July 13, 1993
    Assignee: BASF Aktiengesellschaft
    Inventors: Walter Denzinger, Heinrich Hartmann, Alexander Kud, Richard Baur, John Feldmann, Hans-Juergen Raubenheimer
  • Process for producing color-stable, industrial-grade methyl glucoside
    Patent number: 4797478
    Abstract: A process for producing an industrial-grade methyl glucoside with improved color stability. Glucose is reacted in two steps with methanol and a higher-boiling alcohol at elevated temperatures in the presence of an acidic, preferably heterogeneous catalyst, under as dry as possible conditions.
    Type: Grant
    Filed: March 23, 1987
    Date of Patent: January 10, 1989
    Assignee: CPC International Inc.
    Inventors: Rolf Lebuhn, John Feldmann, Hubert Koebernick
  • Process for recovering pure crystalline monoanhydrohexitols and dianhydrohexitols
    Patent number: 4564692
    Abstract: A simplified economical process is provided for preparing pure anhydro sugar alcohols by a controlled crystallization from concentrated aqueous solutions or melts containing these alcohols. These pure anhydro sugar alcohols are useful as polyol components in making polyester and polyurethane polymers.
    Type: Grant
    Filed: July 18, 1983
    Date of Patent: January 14, 1986
    Assignee: CPC International Inc.
    Inventors: John Feldmann, Hubert Koebernick, Klaus Richter, Hans-Ulrich Woelk