US6200628B1
Expired / Lapsed
US
⏱️ 0.0 years remaining
Use of inorganic particles and method for making and identifying a substrate or an article
Assignee: SICPA Holding SA
•
Filing: 1998-10-02
•
Granted: 2001-03-13
•
Expires: 2018-10-02
Abstract
Abstract The present invention relates to inorganic particles comprising at least two chemical elements in a predefined and analytically identifiable ratio. These particles are used as a marking means incorporated into or applied onto any desired article. They provide a high security potential against counterfeiting since the analysis depend on a combination of spatial as well as of chemical information. In a first step the information containing particle has to be localized by scanning electron microscopy and in a second step the ratio of elements is analysed using energy—or wavelength—dispersive X-ray analysis (SEM/EDX).
Inventors
- 👤 Olivier Rozumek
- 👤 Edgar Müller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 14:41
CPC Classifications
C; C09; C09C; C09C1/00; C09C1/0015; C09C1/0021; B; B41; B41M; B41M3/00; B41M3/14; B42; B42D; B42D15/00; B42D25/00; B42D25/20; B42D25/29; C09C1/0078; C09C1/0081; C09D; C09D11/00; C09D11/50; B41M3/144; C01; C01P; C01P2002/00; C01P2002/02; C01P2002/80; C01P2002/85; C01P2004/00; C01P2004/01; C01P2004/03; C01P2004/60; C01P2004/61; C01P2004/62; C01P2006/00; C01P2006/42; C01P2006/60; C01P2006/80; C09C2200/00; C09C2200/10; C09C2200/1087; C09C2210/00; C09C2210/10; C09C2210/20; C09C2210/50; C09C2220/00; C09C2220/20
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
68 words
A method of marking and authenticating an item, said method comprising steps of applying to said item a marking comprising at least one particle of a non-stoichiometric crystalline compound containing at least two chemical elements in a predetermined known ratio, and subsequently authenticating the item by locating said particle on said item, and then analyzing the particle to determine whether it contains said elements, in said predetermined ratio.
Claim 2
Independent Claim
68 words
A method of marking and authenticating an item, said method comprising steps of applying to said item a marking comprising at least one particle of a non-stoichiometric crystalline compound containing at least two chemical elements in a predetermined known ratio, and subsequently authenticating the item by locating said particle on said item, and then analyzing the particle to determine whether it contains said elements, in said predetermined ratio.
Claim 3
Dependent Claim
16 words
The method of claim 1 , wherein the particle is located using back scattered electron detection.
Claim 4
Dependent Claim
21 words
The method of claim 1 , wherein the particle is incorporated in a coating composition before being applied to said item.
Claim 5
Dependent Claim
31 words
The method of claim 3 , further comprising a step of adding at least one camouflaging compound to said coating, said camouflaging compound containing at least one of said chemical elements.
Claim 6
Dependent Claim
14 words
The method of claim 1 , wherein said crystalline compound has a garnet structure.
Claim 7
Dependent Claim
14 words
The method of claim 1 , wherein said crystalline compound has a spinel structure.
Claim 8
Dependent Claim
14 words
The method of claim 1 , wherein said crystalline compound has a perovskite structure.
Claim 9
Dependent Claim
14 words
The method of claim 1 , wherein said crystalline compound has a zircon structure.
Claim 10
Dependent Claim
28 words
The method of claim 1 , wherein the crystalline compound is selected from the group consisting of oxysulfides of rare-earth elements and oxysulfides of yttrium, and combinations thereof.
References Cited (Backward Citations)
US3001887A
Cited
US3772200A
Cited
US4053433A
Cited
DE2651528A1
Cited
US4183989A
Cited
US4183989B1
Cited
US4329393A
Cited
US4387112A
Cited
US5811152A
Cited
US5670239A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2004-03-12 | 2004-09-11 | 2005-03-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2008-03-12 | 2008-09-11 | 2009-03-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2012-03-12 | 2012-09-11 | 2013-03-13 | $7700.00 | Window Closed / Lapsed |