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:
Jul. 30, 1991
Filed:
Oct. 01, 1990
Applicant:
Inventor:
Yuval Halpern, Skokie, IL (US);
Assignee:
Chemical Waste Management, Inc., Oak Brook, IL (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G21F / ; G21F / ;
U.S. Cl.
CPC ...
252632 ; 252631 ; 423-8 ; 423-9 ; 423 11 ; 423 15 ; 203 38 ; 210682 ; 210729 ; 556148 ; 556137 ; 560169 ; 562554 ; 562566 ;
Abstract
A process for removing metal salts from an H.sub.4 EDTA precipitate by esterification with an esterification reagent to produce an esterification mixture comprising a solid metal salt an EDTA ester and thereafter separating the solid metal salt from the esterification mixture.