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:
Aug. 21, 1990
Filed:
Dec. 29, 1986
Applicant:
Inventors:
Kunio Imai, Saitama, JP;
Saburo Aso, Saitama, JP;
Hideo Kudo, Saitama, JP;
Masataka Uchidoi, Yamanashi, JP;
Assignees:
Pioneer Electronic Corporation, Tokyo, JP;
Pioneer Video Corporation, Yamanashi, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B32B / ;
U.S. Cl.
CPC ...
428 64 ; 428 65 ; 428402 ; 428418 ; 428689 ; 428913 ; 430945 ; 3461351 ; 369284 ; 369288 ;
Abstract
An optical disk and method of preparing it in which a macromolecular substrate has information bits mechanically formed on its surface and a reflective metallic reflective film is deposited thereover. The grain size of the metallic reflective film is kept to less than 50 nanometers by depositing at a rate of no more than 1.5 nanometers per second.
Imai, Kunio. (1990). Optical recording medium and method manufacturing thereof (U.S. Patent No. 4950520). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/4950520
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile