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:
Mar. 02, 1999
Filed:
Sep. 20, 1996
Applicant:
Inventors:
Jiansheng Tang, Naperville, IL (US);
Donald E Govoni, Joliet, IL (US);
Assignee:
Nalco Chemical Company, Naperville, IL (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C02F / ;
U.S. Cl.
CPC ...
252180 ; 252353 ; 252354 ; 252355 ; 252356 ; 252357 ; 252175 ; 510247 ; 510264 ; 510266 ; 210698 ; 5253284 ; 525420 ; 5253282 ; 528322 ; 528328 ; 528332 ;
Abstract
A biodegradable anti-scalant for steam generators, boilers and other heat transfer equipment is provided. Anti-scalants prepared in accordance with the present invention include aspartic acid, poly(aspartic acid) and copolymers of aspartic acid and functionalized aspartic acid. Anti-scalants provided in accordance with the present invention are biodegradable and therefore more environmentally friendly than currently available anti-scalant for use with hard water. Methods and use of making anti-scalants are also provided.