Optical effect layers showing a viewing angle dependent optical effect; processes and devices for their production; items carrying an optical effect layer; and uses thereof
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Aug 8, 2017
Grant Date -
Dec 10, 2015
app pub date -
Jan 7, 2014
filing date -
Jan 9, 2013
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
The invention relates to the field of the protection of security documents such as for example banknotes and identity documents against counterfeit and illegal reproduction. In particular, the invention relates to optical effect layers (OEL) showing a viewing-angle dependent optical effect, devices and processes for producing said OEL and items carrying said OEL, as well as uses of said optical effect layers as an anti-counterfeit means on documents. The OEL comprises a plurality of non-spherical magnetic or magnetizable particles, which are dispersed in a coating composition comprising a binder material, wherein in at least a loop-shaped area of the OEL at least a part of the plurality of non-spherical magnetic or magnetizable particles are oriented such that their longest axis is substantially parallel to the plane of the OEL, and wherein, in a cross-section perpendicular to the OEL and extending from the center of the central area, the longest axis of the oriented particles present in the loop-shaped area forming the impression of the loop-shaped body follow a tangent of either a negatively curved or a positively curved part of a hypothetical ellipse or circle.
First Claim
Other Claims data not available
Family
International Classification(s)
- B41M:PRINTING, DUPLICATING, MARKING, OR COPYING PROCESS....
- B05D:PROCESSES FOR APPLYING LIQUIDS OR OTHER FLUENT MAT....
- G07D:SORTING, TESTING, CHANGING, DELIVERING, OR OTHERWI....
- B42D:BOOKS; BOOK COVERS; LOOSE LEAVES; PRINTED MATTER O....
- B44F:SPECIAL DESIGNS OR PICTURES
- H01F:MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF M....
- 2014 Application Filing Year
- B41M Class
- 375 Applications Filed
- 345 Patents Issued To-Date
- 92 % Issued To-Date
Cited Art Landscape
Patent Citation Ranking
- 2 Citation Count
- B41M Class
- 32.52 % this patent is cited more than
- 8 Age
Maintenance Fees
| Fee | Large entity fee | small entity fee | micro entity fee | due date |
|---|---|---|---|---|
| 7.5 Year Payment | $3600.00 | $1800.00 | $900.00 | Feb 8, 2025 |
| 11.5 Year Payment | $7400.00 | $3700.00 | $1850.00 | Feb 8, 2029 |
