Transient optical state change materials useful in copy-protected compact discs

• US 20040121262A1
• Filed: 09/26/2003
• Published: 06/24/2004
• Est. Priority Date: 09/26/2002
• Status: Active Grant

• Current Assignee: Verification Technologies, Inc. (Sun Chemical, Inc.)
• Original Assignee: Verification Technologies, Inc. (Sun Chemical, Inc.)
• Inventors: Li, Junzhong, Vig, Rakesh, Selinfreund, Richard H., Gerger, Scott
• Granted Patent: US 7,344,823 B2
• Time in Patent Office: Days
• US Class Current: 430/270.15
• CPC Class Codes: C07D 279/18 [b, e]-condensed with two six-membered rings
• CPC Class Codes: G11B 20/00086 Circuits for prevention of unauthorised reproduction or copying, e.g. piracy indicating unauthorised use of record carriers in general G11B23/28; scrambling for television signal recording H04N5/913; network architectures or network protocols for network security H04L63/00; cryptographic mechanisms or cryptographic arrangements for secret or secure communication H04L9/00
• CPC Class Codes: G11B 20/00608 wherein the material that the record carrier is made of is altered, e.g. adding reactive dyes that alter the optical properties of a disc after prolonged exposure to light or air
• CPC Class Codes: G11B 7/252 of layers other than recording layers
• CPC Class Codes: Y10S 430/146 Laser beam

Abstract

A copy-protected optical medium comprising transient optical state change security materials that demonstrating an optical state change when exposed to the wavelengths of from about about 770 nm to about 830 nm.

Claims

1. A compound of the following structure:

2. The compound of claim 1 wherein the compound is associated with an optical data deformation in a manner such that the read of the optical data deformation is different when the compound is in its initial optical state and its second optical state.