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:
Sep. 16, 2003
Filed:
Sep. 09, 2002
Applicant:
Inventors:
Joseph C. Fan, Lake Zurich, IL (US);
Lai-Duien Grace Fan, Lake Zurich, IL (US);
Jacob Mazo, Wilmette, IL (US);
Assignee:
Donlar Corporation, Bedford Park, IL (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C23F 1/104 ;
U.S. Cl.
CPC ...
C23F 1/104 ;
Abstract
Novel corrosion inhibiting compositions comprising a combination of amino thiol or amino disulfide compounds with acidic amino acid polymers inhibit carbon dioxide induced corrosion of ferrous metals in aqueous systems. Particularly effective inhibitor compositions are the natural amino acids cysteine and cystine and their decarboxylated analogues cysteamine and cystamine in combination with polyaspartic acid. The inhibitor compositions are particularly useful for preventing corrosion and scale formation in oil production applications.