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:
Feb. 12, 1980
Filed:
Sep. 05, 1978
Applicant:
Inventor:
Akira Yoshio, Tokyo, JP;
Assignee:
Sony Corporation, Tokyo, JP;
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
C23F / ; B29D / ;
U.S. Cl.
CPC ...
148 / ; 204-5 ; 264107 ;
Abstract
The metallic surface of a master plate or mother plate is oxidized in a solution of hypochlorite to form a parting layer upon which a metal layer is plated. The metal layer may be stripped from the master plate or mother plate aided by the parting layer to form a matrix or stamper from which a plastic record disc, such as, a video disc, can be molded.