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:
Sep. 12, 1995
Filed:
May. 13, 1993
Abraham Schwartz, Durham, NC (US);
Gary A Woodward, Alexandria, VA (US);
Caribbean MicroParticles Corp., Hato Rey, PR (US);
Abstract
A coded hidden identification is provided for a selected printable item by providing a coded printing composition based on adding to and substantially uniformly mixing a selected number of populations of microparticles with a printing composition, said microparticles being normally invisible to the human eye and each such population having a group of microparticles of similar size, shape or color to form a combination of highly uniform and unique properties, the printing composition adapted for use in a printing machine, such as a photocopy or laser printing machine cartridge, and printing items with the coded printing composition so as to transfer the microparticles to the item. The microparticles may be characterized by a number of detectable properties, or a combination thereof, which are not detectable by the human eye to provide the coded hidden identification. The microparticles may contain, for example, a fluorescent dye and be made to fluoresce to reveal the identification, or they may be of a form such that magnification may be used to reveal the hidden identification.