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:
Mar. 20, 2012
Filed:
Oct. 27, 2008
James M. Depuydt, Woodbury, MN (US);
Eric D. Levinson, Woodbury, MN (US);
Ramnath Subramaniam, Woodbury, MN (US);
James M. DePuydt, Woodbury, MN (US);
Eric D. Levinson, Woodbury, MN (US);
Ramnath Subramaniam, Woodbury, MN (US);
Imation Corp., Oakdale, MN (US);
Abstract
This disclosure describes optical media that is compatible with conventional DVD drives. Unlike conventional DVDs, however, the described media uses a lower cost, lower quality material for one of the substrates. In particular, a so-called 'dummy' substrate may comprise a non-optical grade polymeric material. In some cases, the dummy substrate may include post-consumer recycled materials, such as recycled polycarbonate. In other cases, dummy substrate may comprise a low cost non-optical grade polycarbonate, such as an industrial grade polycarbonate. In still other cases, the dummy substrate may comprise a polycarbonate blend, or other non-polycarbonate materials.