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:
Nov. 14, 1978
Filed:
Jun. 08, 1977
Applicant:
Inventors:
Akira Kaneko, Iwaki, JP;
Masaki Ohya, Iwaki, JP;
Masayasu Suzuki, Iwaki, JP;
Akio Kobayashi, Iwaki, JP;
Assignee:
Kureha Kagaku Kogyo Kabushiki Kaisha, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H04N / ; H04N / ; C08L / ; B32B / ;
U.S. Cl.
CPC ...
428 64 ; 260 / ; 260879 ; 274 / ; 274 / ; 428520 ; 428522 ; 526328 ; 526329 ;
Abstract
A phonograph or video disc comprises at least one unsaturated nitrile copolymer and has therein an unsaturated nitrile content of from 40 to 90 percent by weight, and the disc exhibits a Clash-Berg flex temperature of from 50.degree. to 120.degree. C, an absorbed impact energy of at least 0.5kg.cm. when tested with a test specimen thereof of a 2-mm. thickness by a Dynstat impact test according to BS-1330-1946, and a Shore D hardness of from 75 to 95.