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:
May. 30, 1989
Filed:
Jun. 23, 1987
Applicant:
Inventors:
Yukihide Tsukamoto, Ichihara, JP;
Yasuhiro Sato, Kamagaya, JP;
Minoru Seino, Yotsukaido, JP;
Akio Toyoda, Ichihara, JP;
Assignee:
Dainippon Ink & Chemicals, Inc., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B32B / ;
U.S. Cl.
CPC ...
428215 ; 428519 ; 428910 ; 2641761 ;
Abstract
A biaxially stretched composite styrene resin sheet of a multilayer structure, comprising at least one layer of polystyrene and at least two layers of a mixture of polystyrene and styrene/butadiene block copolymer resin, wherein both outside layers are formed of said mixture, the thickness of each of the outside layers is 1 to 20% of the total thickness of the sheet, and the entire sheet is biaxially stretched.