Patents by Inventor Karen S. Eastman

Karen S. Eastman 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).

  • Elution of metal ions from chelating resin using amino acid eluant
    Patent number: 9187588
    Abstract: A method of eluting metal ions from a bed of metal-loaded chelating resin wherein the resin includes a crosslinked styrene-divinylbenzene copolymer matrix with pendent methyleneaminopyridine or phosphonic acid groups and the method includes the step of passing an eluant through the bed to at least partially remove the metal ions from the chelating resin and create a metal-rich eluate, wherein the eluant includes an aqueous solution comprising an amino acid compound having a molecular weight less than 500 Daltons.
    Type: Grant
    Filed: August 13, 2013
    Date of Patent: November 17, 2015
    Assignees: Dow Global Technologies LLC, Rohm and Haas Company
    Inventors: Charles R. Marston, Stephen M. Smith, Matthew L. Rodgers, Karen S. Eastman
  • ELUTION OF METAL IONS FROM CHELATING RESIN USING AMINO ACID ELUANT
    Publication number: 20150175728
    Abstract: A method of eluting metal ions from a bed of metal-loaded chelating resin wherein the resin includes a crosslinked styrene-divinylbenzene copolymer matrix with pendent methyleneaminopyridine or phosphonic acid groups and the method includes the step of passing an eluant through the bed to at least partially remove the metal ions from the chelating resin and create a metal-rich eluate, wherein the eluant includes an aqueous solution comprising an amino acid compound having a molecular weight less than 500 Daltons.
    Type: Application
    Filed: August 13, 2013
    Publication date: June 25, 2015
    Inventors: Charles R. Marston, Stephen M. Smith, Matthew L. Rodgers, Karen S. Eastman