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. 08, 2000
Filed:
Apr. 17, 1998
Applicant:
Inventors:
Jiansheng Tang, Naperville, IL (US);
Shi-Liang Fu, Richmond, TX (US);
Daniel H Emmons, Rosenberg, TX (US);
Assignee:
Nalco Chemical Company, Naperville, IL (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C23F / ; C23F / ; C23F / ;
U.S. Cl.
CPC ...
106 1832 ; 106 1831 ; 210698 ; 252180 ; 2523891 ; 25238922 ; 25238923 ; 25238961 ; 25238962 ; 252390 ; 252392 ; 252394 ; 252396 ; 422 16 ; 422 17 ;
Abstract
Several copolymers of aspartic acid and another monomer provide effective mild steel corrosion inhibitors and scale formation inhibitors under oil field conditions. The copolymers are polymers of modified polyaspartic acid mer units and polyaspartic acid mer units. The resulting polymers are biodegradable.