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:
Jan. 04, 1994
Filed:
Aug. 27, 1992
Applicant:
Inventor:
John D Johnson, Sugar Land, TX (US);
Assignee:
Nalco Chemical Company, Naperville, IL (US);
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C23F / ;
U.S. Cl.
CPC ...
25238961 ; 25238962 ; 252392 ; 252396 ; 422-8 ; 166902 ;
Abstract
A method of corrosion inhibition using a gelled inhibitor is disclosed. The method comprises consecutively introducing into an annular region of a jacketed pipeline a hydrogel slurried in an environmentally innocuous oil medium and a corrosion inhibitor dissolved in an aqueous medium. The liquid media are contacted to form a gelled corrosion inhibitor in the annulus. The method is particularly useful in buried pipelines where corrosion monitoring is difficult.