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. 07, 2013
Filed:
Dec. 12, 2009
Friedrich-karl Bruder, Krefeld, DE;
Wilfried Haese, Odenthal, DE;
Rafael Oser, Krefeld, DE;
Ulrich Blaschke, Krefeld, DE;
Raymond Wong, Hong Kong, CN;
Ice Zhang, Shanghai, CN;
Jörg Wehrle, Remagen, DE;
Michael Roppel, Burscheid, DE;
Friedrich-Karl Bruder, Krefeld, DE;
Wilfried Haese, Odenthal, DE;
Rafael Oser, Krefeld, DE;
Ulrich Blaschke, Krefeld, DE;
Raymond Wong, Hong Kong, CN;
Ice Zhang, Shanghai, CN;
Jörg Wehrle, Remagen, DE;
Michael Roppel, Burscheid, DE;
Abstract
This invention relates to the use of polycarbonate for the production of an optical recording medium in which secure high speed operation, a transcriptability of the pit/groove structure of >85% and sufficient disc flatness can be achieved and the polycarbonate is based on bisphenol A and the polycarbonate contains a release agent in an amount less than 2000 ppm.