| PATENT ASSIGNEE'S COUNTRY | USA |
| UPDATE | 04.00 |
| PATENT ASSIGNEE | This data is not available for free |
| PATENT CLAIMS |
The process of mfg & testing authenticatable paper - Treat slurry of papermaking fibers selected from: bleached chemical pulp & high yield lignin contg mechanical pulp with 50-200 lbs/ton of water soluble fluorescent whitening agent so as to cause said agent to become attached to said fiber - Mixing the treated fibers with a bleached chemical paper making furnish to achieve a concn of treated fibers in the furnish of 0.1-4 lbs/ton of the furnish - Producing a paper prodt from the papermaking furnish - Exposing paper prodt to long wave UV illumination to detect presence of the individual treated fibers in the paper prodt wherein the individual treated fibers fluoresce blue |
| PATENT PHOTOCOPY | Available on request |
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