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:
Sep. 07, 1993
Filed:
Jun. 07, 1991
Applicant:
Inventors:
Karl Funk, Griesheim, DE;
Heinz Gross, Rossdorf, DE;
Assignee:
Roehm GmbH Chemische Fabrik, Darmstadt, DE;
Primary Examiner:
Int. Cl.
CPC ...
B32B / ; B32B / ; C08F / ;
U.S. Cl.
CPC ...
428215 ; 428220 ; 428412 ; 428421 ; 428419 ; 428480 ; 428521 ; 428522 ;
Abstract
Extruded, smooth finished solid sheet or film, which may have a thickness <1 mm, comprised of a thermoplastic plastic (such as polycarbonate) with a glass transition temperature >50.degree. C., which under conditions of orientation displays optical birefringence, may be manufactured into a flat strip with smooth finished surfaces, to yield a strip which has characteristics as follows: