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. 18, 2005
Filed:
Jan. 12, 2001
Applicants:
Sven-eric Lunner, Avesta, SE;
Fredrik Hägg, Uppsala, SE;
Inventors:
Sven-Eric Lunner, Avesta, SE;
Fredrik Hägg, Uppsala, SE;
Assignee:
Avestapolarit Aktiebolag (Publ), Stockholm, SE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C11D 1700 ;
U.S. Cl.
CPC ...
Abstract
A long-time stable pickling agent for the removal of an oxide layer on a stainless steel after heat treatment, such as welding, which pickling agent comprises nitric acid and fillers and constitutes of a pickling paste or pickling gel to be coated on the heat treated stainless steel, or of a pickling liquid to be sprayed on the steel. According to the invention, the pickling agent also comprises urea for reduced formation of nitrous fumes when the pickling agent is used.