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:
Mar. 15, 1977
Filed:
Mar. 06, 1975
Applicant:
Inventors:
Charles Georges Brun, Montataire, FR;
Philippe Marcel Tirmarche, Prouvy, FR;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C23D / ;
U.S. Cl.
CPC ...
148-63 ; 148-635 ; 148 16 ; 427330 ; 4273 / ; 4273 / ;
Abstract
For treating a steel sheet for subsequent enamelling of the sheet with one coat of enamel: After rolling the sheet, there is deposited thereon a coat of nickel and/or cobalt, a salt of said metals or mixtures of said salts. After drying, the sheet is annealed in a decarburizing atmosphere so as to substantially totally decarburize it and, during the cooling of the annealing cycle, the coated sheet is subjected to the action of an oxidizing atmosphere containing 2 to 7% of water vapor and having an H.sub.2 /H.sub. 2 O ratio which is less than 6.