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:
Feb. 18, 2003
Filed:
Mar. 15, 2001
Applicant:
Inventor:
Norman B. Rainer, Richmond, VA (US);
Assignee:
Other;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B32B 5/00 ; B32B 3/00 ; C08J 5/20 ;
U.S. Cl.
CPC ...
B32B 5/00 ; B32B 3/00 ; C08J 5/20 ;
Abstract
A sulfur-containing water insoluble hydrogel polymer for selectively removing trace amounts of dissolved metal species is produced from a reaction product of nitrilotriacetic acid (NTA) and polyethylenimine (PEI) which is then treated in a water-swollen state with carbon disulfide. The polymer has a physical configuration that facilitates formation of a porous stationary bed through which water can pass for treatment.