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:
May. 16, 2006
Filed:
Dec. 10, 2003
Applicants:
Irl E. Ward, Bethlehem, PA (US);
Danielle French, West Warren, MA (US);
Inventors:
Irl E. Ward, Bethlehem, PA (US);
Danielle French, West Warren, MA (US);
Assignee:
BASF Aktiengesellschaft, Ludwigshafen, DE;
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
C07C 229/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
The invention relates to the preparation of ultra-high purity 1,2-diaminocyclohexane-tetraacetic acid being essentially free of unwanted metal and metal ion contaminants and its use as a stabilizer for ultra-high purity hydroxylamine compounds used extensively in the production of high premium electronic components.