Patents by Inventor Piet Marc Paul Bogaert

Piet Marc Paul Bogaert 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).

  • Biodegradable complexing agents for heavy metals
    Patent number: 6139751
    Abstract: Heavy metals can be effectively complexed with a derivative of a fructan, which derivative contains complexing groups chosen from --X--CY--ZM, --X--CY--ZM, --X--CY--S--S--CY--X--Q, --PY'(--Z'M).sub.2, --SO.sub.3 M and --NR--CH.sub.2 --COOM, where M is a metal or hydrogen, Q denotes the residue of an alcohol or polyol, R is hydrogen or carboxymethyl and X, Y, Y', Z and Z', independently of one another, are O, S or NH and at least one of X, Y and Z is S, with a degree of substitution of 0.1-2.5. The complexing groups are in particular xanthate, xanthide or dithiocarbamate groups.
    Type: Grant
    Filed: January 14, 1999
    Date of Patent: October 31, 2000
    Assignee: Cooperatie Cosun U.A.
    Inventors: Piet Marc Paul Bogaert, Theodoor Maximiliaan Slaghek, Henricus Wilhelmus Carolina Raaijmakers