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, 2001
Filed:
Mar. 03, 1999
Jimmie D. Petty, Columbia, MO (US);
William G. Brumbaugh, Columbia, MO (US);
James N. Huckins, Columbia, MO (US);
Thomas W. May, Columbia, MO (US);
Raymond Wiedmeyer, Columbia, MO (US);
The United States of America as represented by the Secretary of the Interior, Washington, DC (US);
Abstract
A device is provided for capturing ionic metal species (e.g., Cd, Cu, Ni, Pb and Zn) dissolved in water. The device includes a nonporous polymeric tube for capturing the dissolved ionic metal species. The tube is formed from a membrane having transient cavities therein having an average pore size greater than 10 Å. A sequestration medium, contained within the tube, transforms the ionic metal species captured by the tube into a complexed, non-mobile metal species. The sequestration medium is capable of diffusing through the nonporous polymeric membrane at a controlled rate to form the complexed, non-mobile species and can comprise a mixture and metal complexing agent (e.g., a quinoline) and a long chain organic acid (e.g., oleic acid).