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. 02, 2003
Filed:
Feb. 14, 2001
Applicant:
Inventors:
Uwe Numrich, Gross-Zimmern, DE;
Klaus Hofmann, Griesheim, DE;
Roger Hugh Emerson, Hong Kong SAR, CN;
Thomas Pfaff, Hemsbach, DE;
Michael Meier-Kaiser, Alsbach-Haehnlein, DE;
Assignee:
Roehm GmbH & Co. KG, Darmstadt, DE;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B29D 0/00 ; B29C 3/340 ; B32B 2/736 ; B32B 7/02 ; C09K 1/900 ;
U.S. Cl.
CPC ...
B29D 0/00 ; B29C 3/340 ; B32B 2/736 ; B32B 7/02 ; C09K 1/900 ;
Abstract
Injection-molding materials comprised of polycarbonate can be processed into optically isotropic films in a chill roll extrusion method. The optically isotropic films are used as covering films for protecting data carriers (CD-ROMS) from becoming scratched, or they are used as supporting materials for the information layer.