Method for authentication by chemical marking or tracing of...

Details Method for authentication by chemical marking or tracing of... Method for authentication by chemical marking or tracing of...

2003-10-29

2009-10-20

Porta, David P (Department: 2884)

Radiant energy

Invisible radiant energy responsive electric signalling

With or including a luminophor

C250S362000

Reexamination Certificate

active

07605372

ABSTRACT:
The invention concerns a method for authenticating different objects or substances to be identified comprising at least two phases: during an initial phase, selecting a plurality of chemical markers, assigning to and incorporating in each of the objects or substances a combination of markers, establishing an identification and/or authentication code (blocks2, 11), storing in memory data or code for identifying and/or authenticating all the objects or substances and annex data; during an identification and/or authentication phase: a spectrophotometric analysis so as to determine a specific scanned code of the presence or absence of the markers (blocks3, 4), identifying the object or the substance by comparing the scanned code and the identification and/or authentication codes (block6). The invention is particularly applicable to fighting against counterfeiting, to automatic sorting, and the like.

REFERENCES:
patent: 5592561 (1997-01-01), Moore
patent: 5974150 (1999-10-01), Kaish et al.
patent: 6610351 (2003-08-01), Shchegolikhin et al.
patent: 2005/0059681 (2005-03-01), Cremer et al.
patent: 1 182 048 (2002-02-01), None
patent: 2 757 658 (1998-06-01), None
patent: 2 822 269 (2002-09-01), None
patent: WO 97/24699 (1997-07-01), None

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