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. 07, 2003
Filed:
Sep. 29, 1997
Anthony Ewart Hughes, Olinda, AU;
Karen Joy Hammon Nelson, Clayton, AU;
Russell James Taylor, Balwyn, AU;
Bruce Roy William Hinton, Frankston, AU;
Mark Julian Henderson, Glenhuntly, AU;
Lance Wilson, East Bentleigh, AU;
Sally Ann Nugent, Surrey Hills, AU;
Commonwealth Scientific and Industrial Research Organisation, Campbell Act, AU;
Abstract
A metal surface which has been cleaned using an alkaline based solution is treated with an acidic solution which contains rear earth ions to remove any smut which may have been produced during the alkaline cleaning. A coating is formed on the cleaned surface using a different acidic solution containing rare earth cations which have multiple valence states. When the surface is reacted with coating solution, an increase in the pH at the metal surface indirectly results in precipitation of a rare earth metal such as cerium onto the surface. Alternatively, after the removal of the smut, the surface may be coated using a painting technique.