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:
Jun. 14, 1977
Filed:
Dec. 18, 1975
Jay Smith, III, Pacific Palisades, CA (US);
Virgle L Hedgcoth, Santa Monica, CA (US);
Identicator Corporation, San Bruno, CA (US);
Abstract
The present invention comprises an apparatus for inkless fingerprinting directly on a medium, such as a check. The apparatus can include a stamp housing having a replaceable cartridge with a pair of reservoir resilient foam cell pads having a semi-sealed surface. One of the pads will contain a liquid developer solution, for example, a water soluble inorganic compound; while the other pad will contain a liquid reagent solution, for example, a water soluble inorganic compound which can react with the liquid developer solution to deposit a non-soluble colorant precipitate. Advantageously, the liquid developer solution will include a carrier solvent that is relatively non-evaporative over the life of the applicator, and has a viscosity value that permits the liquid developer solution to be deposited on a porous medium surface and maintain a coating having only sufficient thickness above the medium surface to contact and adhere to substantially only the ridge pattern of a finger. A second liquid reagent solution will be contained in the other pad and has a relatively lower viscosity to permit the reagent solution to be absorbed to a greater degree into the porous medium.