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:
May. 13, 1986
Filed:
Nov. 08, 1984
Applicant:
Inventors:
Assignee:
Sandoz Ltd., Basel, CH;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C23C / ;
U.S. Cl.
CPC ...
148-627 ; 204 351 ; 204 383 ; 427333 ;
Abstract
A process for sealing an oxidized aluminium or aluminium alloy surface comprising sealing the surface in the presence of a sealing agent to hinder the formation of a smut layer, the agent being the reaction product of one or more sulphonated aromatic compounds with an aldehyde and/or dimethylolurea or a mixture of formaldehyde and urea. A novel composition comprising the reaction product above and a cobalt or nickel salt may also be used as the above mentioned sealing agent.