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. 16, 2008
Filed:
Apr. 28, 2005
Applicants:
Helmut-werner Heuer, Krefeld, DE;
Rolf Wehrmann, Krefeld, DE;
Michael Erkelenz, Duisburg, DE;
Alexander Meyer, Krefeld, DE;
Melanie Möthrath, Düsseldorf, DE;
Inventors:
Helmut-Werner Heuer, Krefeld, DE;
Rolf Wehrmann, Krefeld, DE;
Michael Erkelenz, Duisburg, DE;
Alexander Meyer, Krefeld, DE;
Melanie Möthrath, Düsseldorf, DE;
Assignee:
Bayer MaterialScience AG, , DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C08G 64/06 (2006.01); G02B 1/04 (2006.01);
U.S. Cl.
CPC ...
Abstract
An optical data storage comprising a thermoplastic copolycarbonate is disclosed. The copolycarbonate contains at least one unit derived from dihydroxydiphenyl ether and at least one unit derived from at least one member selected from the group consisting of 4,4'dihydroxybiphenyl and 1,1-bis-(4-hydroxyphenyl)-3,3,5-trimethylcyclohexane.