The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 02, 2012
Filed:
Oct. 05, 2009
Jean Frechet, Oakland, CA (US);
Emine Boz, Los Angeles, CA (US);
Mamadou Diallo, Pasadena, CA (US);
Yonggui Chi, Singapore, SG;
Jean Frechet, Oakland, CA (US);
Emine Boz, Los Angeles, CA (US);
Mamadou Diallo, Pasadena, CA (US);
Yonggui Chi, Singapore, SG;
California Institute of Technology, Pasadena, CA (US);
The Regents of the University of California, Oakland, CA (US);
Abstract
Hyperbranched macromolecules and methods are described for selectively filtering contaminants such as anions from water and non-aqueous solutions, particularly in the presence of competing contaminants including other anions. The hyperbranched macromolecules may contain alkyl, 2-hydroxyalkyl, 2-methyl-2-hydroxylalkyl, 2-hydroxy-2-phenylalkyl, and other groups, which may be hydrophilic or hydrophobic. The molecules may preferentially bind to the contaminant at interest at low pH, and release the contaminant at a pH of about 9. The molecules may be used to filter contaminants including perchlorate and nitrate even in the presence of high sulfate concentrations.