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  Method of making an authenticatable article and method of authenticatingUSPTO Application #: 20070111315Title: Method of making an authenticatable article and method of authenticating Abstract: One method of authenticating an article comprises illuminating an article and determining if an altered emission is within a selected emission range. The article comprises a polymer layer and a coating disposed on a side of the polymer layer. The polymer layer comprises a first taggant, and the coating causes a predetermined alteration in an emission from the taggant to form the altered emission. (end of abstract) Agent: Cantor Colburn LLP - Ge Plastics - Smith - Bloomfield, CT, US Inventors: Sriramakrishna Maruvada, Radislav Potyrailo, Philippe Schottland USPTO Applicaton #: 20070111315 - Class: 436056000 (USPTO) Related Patent Categories: Chemistry: Analytical And Immunological Testing, Tracers Or Tags The Patent Description & Claims data below is from USPTO Patent Application 20070111315. Brief Patent Description - Full Patent Description - Patent Application Claims
CROSS REFERENCE TO RELATED APPLICATIONS [0001] This application is a divisional of U.S. application Ser. No. 10/889,913, filed on Jul. 13, 2004, which is hereby incorporated by reference. BACKGROUND OF THE INVENTION [0002] In the field of data storage media, digital content owners, such as music companies, movie studios, video game manufacturers, computer software manufacturers, and the like, desire increased flexibility in the distribution of their digital content onto various forms of data storage media. Digital content kiosks are becoming an increasingly popular means for displaying, and in some cases, distributing digital content. Commercially available digital content kiosks utilize a variety of data storage media. However, because these data storage media are pre-mastered, the choice of digital content available to a user is often limited. The costly manufacturing and replication process associated with the data storage media necessitates the production of hundreds to thousands of the data storage media in order to make the production process cost-effective. Thus, the production and distribution of individual or small lots of pre-mastered data storage media is cost-prohibitive. [0003] One possible solution to this problem is the use of write-once or rewritable formats. Such data storage media would allow for the "on-demand" distribution of digital content, expanding the choice of digital content available to a user and eliminating the need for the production of hundreds to thousands of pre-mastered data storage media. However, these data storage media may provide little protection for a digital content owner's intellectual property. A major problem confronting the various makers and users of non-recordable and recordable data storage media such as compact discs (CD), digital versatile discs (DVD), enhanced video discs (EVD), recordable compact discs (CD-R) and recordable digital versatile discs (DVD-R) is the unauthorized reproduction or copying of information by unauthorized manufacturers, sellers, and/or users. Such unauthorized reproduction or duplication of data storage media is often referred to as piracy. Piracy may occur in a variety of ways, including consumer level piracy at the point of end use as well as wholesale duplication of data, substrate and anti-piracy information at the commercial level. Regardless of the manner, piracy of data storage media deprives legitimate digital content providers and manufacturers of significant revenue and profit. [0004] Attempts to stop piracy at the consumer level have included the placement of electronic anti-piracy signals on information carrying substrates along with the information sought to be protected. The machine readers and players of such data storage media are configured to require the identification of such anti-piracy signals prior to allowing access to the desired information. Theoretically, consumer level duplications are unable to reproduce these electronic anti-piracy signals on unauthorized copies and hence result in duplicates and copies that are unusable. [0005] However, numerous technologies to thwart such consumer level anti-piracy technologies have been and continue to be developed. Moreover, commercial level duplications have evolved to the point that unauthorized duplicates may now contain the original electronic anti-piracy circuit, code, etc. For example, commercial level duplication methods include pit copying, radio frequency (RF) copying, "bit to bit" copying and other mirror image copying techniques which result in the placement of the anti-piracy signal on the information carrying substrate of the duplicate along with the information sought to be protected. Other technologies commonly used by hackers include the modification of the computer code in order to remove anti-piracy (also referred to as copy-protection or copy-proofing) features and enable unlimited access to the data. [0006] It would be desirable to have a data storage media that can be easily identified as to being authentic or pirated. One anti-piracy technology aimed at combating these more sophisticated consumer and commercial level reproduction and copying practices involves the placement of `tags` or authentication markers in substrates used in the construction of data storage media. Such tags or authentication markers can be detected at one or more points along the data storage media manufacturing or distribution chain or by the end use reader or player used to access the data on a particular data storage media. [0007] The automated identification of plastic compositions used in data storage media is very desirable for a variety of applications, such as recycling, tracking the manufacturing source, antipiracy protection, and others. Furthermore, it may be desirable for automated authentication of the data storage media. Despite the foregoing, there still remains a need for methods of tagging and authenticating storage media. SUMMARY [0008] This disclosure relates to tagged articles and methods for authenticating. In one embodiment, a method of authenticating an article, comprises: illuminating an article (wherein the article comprises a polymer layer comprising a first taggant and a second taggant disposed adjacent to the first taggant) and altering an emission of at least one of the first taggant and the second taggant by the other of the first taggant and the second taggant, to form an altered emission, and determining if the altered emission is within a selected emission range. [0009] Another method of authenticating an article comprises illuminating an article and determining if an altered emission is within a selected emission range. The article comprises a polymer layer and a coating disposed on a side of the polymer layer. The polymer layer comprises a first taggant, and the coating causes a predetermined alteration in an emission from the taggant to form the altered emission. [0010] One method of making an authenticatable article comprises: forming a first polymer portion comprising a first taggant, forming a second polymer portion comprising a second taggant, making a portion of at least one of the first taggant and the second taggant dysfunctional, and disposing a reflective layer and a protective layer on at least one of the first polymer portion and the second polymer portion. The first polymer portion and second polymer portion are disposed such that, if the first taggant and the second taggant are illuminated at a wavelength that will cause an emission from the first taggant and the second taggant, at least one of the first taggant and the second taggant will cause an alteration in an emission from the other of the first taggant and the second taggant. [0011] The above described and other features are exemplified by the following figures and detailed description. BRIEF DESCRIPTION OF THE DRAWINGS [0012] Refer now to the figures, which are exemplary embodiments, and wherein the like elements are numbered alike. [0013] FIG. 1 is a graphical illustration of intensity versus wavelength for a coating layer and a polycarbonate layer. [0014] FIG. 2 is a schematic representation of excitation of a fluorophore in a coated substrate (schematically illustrating the system of FIG. 1). [0015] FIG. 3 is a graphical illustration of intensity versus wavelength for a coated area, a non-coated area, and a polycarbonate layer. [0016] FIG. 4 is a schematic representation of excitation of a fluorophore in a substrate having coated and uncoated areas (schematically illustrating the system of FIG. 3). [0017] FIG. 5 schematically illustrates the setup employed for fluorescence data acquisition. [0018] FIG. 6 is a graphical illustration of fluorescence versus wavelength for disks molded from polymer without a fluorophore, with and without a reagent spot. [0019] FIG. 7 is a graphical illustration of fluorescence (noimalized intensity) versus wavelength for disks molded from a tagged polymer with a fluorophore, with and without a reagent spot. [0020] FIG. 8 is a graphical illustration of fluorescence difference versus wavelength for a disk molded from a polymer without a fluorophore, where three reagent spots had increasing reagent loadings, thus the fluorescence emission was increasing as a function of reagent concentration. Continue reading... Full patent description for Method of making an authenticatable article and method of authenticating Brief Patent Description - Full Patent Description - Patent Application Claims Click on the above for other options relating to this Method of making an authenticatable article and method of authenticating patent application. ###  How KEYWORD MONITOR works... a FREE service from FreshPatents1. Sign up (takes 30 seconds). 2. Fill in the keywords to be monitored. 3. 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