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:
Dec. 12, 1989
Filed:
Jun. 26, 1987
Applicant:
Inventors:
Nazzareno Azzerri, Pomezia, IT;
Leonardo Giorgi, Anzio, IT;
Assignee:
Nuova Italsider S.p.A., Genoa, IT;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B32B / ;
U.S. Cl.
CPC ...
428632 ; 428666 ; 428680 ; 428684 ; 428469 ;
Abstract
The suitability of the kind of steel strip known as black plate, optionally coated with small quantities of tin or nickel for food packaging, is greating improved by ensuring the presence of a layer of P-type semiconducting oxide on the surface thereof. The quality of the plate is yet further improved by coating the oxide surface with a thin chromic passivation layer that also contains a P-type semiconducting oxide.