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1. WO1996038509 - METHOD AND COMPOSITIONS FOR AUTHENTICATING A PRODUCT OR DOCUMENT

Publication Number WO/1996/038509
Publication Date 05.12.1996
International Application No. PCT/US1996/006405
International Filing Date 07.05.1996
Chapter 2 Demand Filed 06.12.1996
IPC
B41M 3/14 2006.01
BPERFORMING OPERATIONS; TRANSPORTING
41PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
MPRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
3Printing processes to produce particular kinds of printed work, e.g. patterns
14Security printing
B41M 5/124 2006.01
BPERFORMING OPERATIONS; TRANSPORTING
41PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
MPRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
5Duplicating or marking methods; Sheet materials for use therein
124using pressure to make a masked colour visible, e.g. to make a coloured support visible, to create an opaque or transparent pattern, or to form colour by uniting colour-forming components
G03G 21/04 2006.01
GPHYSICS
03PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
GELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
21Arrangements not provided for by groups G03G13/-G03G19/92
04Preventing copies being made of an original
CPC
B41M 3/142
BPERFORMING OPERATIONS; TRANSPORTING
41PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
MPRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING,
3Printing processes to produce particular kinds of printed work, e.g. patterns
14Security printing
142using chemical colour-formers or chemical reactions, e.g. leuco-dye/acid, photochromes
B41M 5/124
BPERFORMING OPERATIONS; TRANSPORTING
41PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
MPRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING,
5Duplicating or marking methods; Sheet materials for use therein
124using pressure to make a masked colour visible, e.g. to make a coloured support visible, to create an opaque or transparent pattern, or to form colour by uniting colour-forming components
G03G 21/04
GPHYSICS
03PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
GELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
21Arrangements not provided for by groups G03G13/00 - G03G19/00, e.g. cleaning, elimination of residual charge
04Preventing copies being made of an original
G03G 21/043
GPHYSICS
03PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
GELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
21Arrangements not provided for by groups G03G13/00 - G03G19/00, e.g. cleaning, elimination of residual charge
04Preventing copies being made of an original
043by using an original which is not reproducible or only reproducible with a different appearence, e.g. originals with a photochromic layer or a colour background
Applicants
  • NOCOPI TECHNOLOGIES, INC. [US]/[US]
Inventors
  • BELDING, Blake, Quenten
  • SILKNITTER, JoAnn
  • STEVENSON, Kevin, Bruce
  • STOVOLD, Terry, William
Agents
  • GERSTENZANG, William, C.
Priority Data
08/455,94931.05.1995US
Publication Language English (EN)
Filing Language English (EN)
Designated States
Title
(EN) METHOD AND COMPOSITIONS FOR AUTHENTICATING A PRODUCT OR DOCUMENT
(FR) PROCEDE ET COMPOSITIONS D'AUTHENTIFICATION D'UN PRODUIT OU D'UN DOCUMENT
Abstract
(EN)
A method and compositions for authenticating a document or article comprises applying a mixture of a carrier, a leuco dye and an activator to a surface of a document or article, wherein the leuco dye and activator react in response to a rubbing force applied to the surface to change color and wherein the activator is at least one selected from the group consisting of amidophenol, anilides with hydroxyl groups and benzoamides with hydroxyl groups and authenticating the document or article by applying a rubbing force to the surface to effect a color change.
(FR)
Cette invention concerne un procédé ainsi que des compositions d'authentification d'un document ou d'un article, lequel procédé consiste à appliquer, sur une surface du document ou de l'article, un mélange se composant d'un véhicule, d'un leuco-colorant et d'un activateur. En réponse à une force de frottement exercée à la surface, le leuco-colorant et l'activateur réagissent en changeant de couleur. L'activateur consiste en au moins un des éléments choisis dans le groupe suivant: amidophénol, anilides comportant des groupes hydroxyle et bentoamides comportant des groupes hydroxyle. Le document ou l'article est ensuite authentifié par application d'une force de frottement à sa surface de manière à entraîner un changement de couleur.
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