| Patent application number | Description | Published |
|---|
| 20100200649 | METHOD OF MARKING A DOCUMENT OR ITEM; METHOD AND DEVICE FOR IDENTIFYING THE MARKED DOCUMENT OR ITEM; USE OF CIRCULAR POLARIZING PARTICLES - Optical identification and/or authentication of a document or item with the help of a marking comprising a random distribution of circular polarized light reflecting particles, the marking being applied to the document or item through an ink, and the reading device exploiting circular polarization to discriminate the flakes from the background. | 08-12-2010 |
| 20110133445 | MARKING BASED ON MODIFIED CHIRAL LIQUID CRYSTAL POLYMERS - A liquid crystal polymer marking is obtainable by a process that comprises applying a chiral liquid crystal precursor composition onto a substrate, heating the composition to a first chiral liquid crystal state, applying to at least one area of the precursor composition a chiral dopant composition, heating the at least one area to bring same to a second chiral liquid crystal state, and subsequently curing and/or polymerizing the resultant product. This abstract is neither intended to define the invention disclosed in this specification nor intended to limit the scope of the invention in any way. | 06-09-2011 |
| 20110135853 | MODIFIED MARKING BASED ON CHIRAL LIQUID CRYSTAL POLYMERS - A liquid crystal polymer marking is obtainable by a process that comprises applying a chiral liquid crystal precursor composition onto a substrate, heating the composition to a chiral liquid crystal state, applying to at least one area of the precursor composition a modifying composition, if necessary, heating the at least one area to bring same to a modified liquid crystal state, and subsequently curing and/or polymerizing the resultant product. This abstract is neither intended to define the invention disclosed in this specification nor intended to limit the scope of the invention in any way. | 06-09-2011 |
| 20110135889 | MARKING BASED ON CHIRAL LIQUID CRYSTAL POLYMERS - A liquid crystal polymer marking is obtainable by a process that comprises applying a chiral liquid crystal precursor composition onto a substrate, heating the composition to a bring same to a chiral liquid crystal state, locally applying at least one modifying agent to modify the chiral liquid crystal state, and curing and/or polymerization the resultant product. This abstract is neither intended to define the invention disclosed in this specification nor intended to limit the scope of the invention in any way. | 06-09-2011 |
| 20110135890 | CHIRAL LIQUID CRYSTAL POLYMER MARKING - A liquid crystal polymer marking is obtainable by a process that comprises applying a first chiral liquid crystal precursor composition onto a substrate, heating the composition to bring same to a first chiral liquid crystal state, applying to at least one area of the first composition a second chiral liquid crystal precursor composition, heating the at least one area to bring same to a second chiral liquid crystal state, and subsequently curing and/or polymerizing the resultant product. This abstract is neither intended to define the invention disclosed in this specification nor intended to limit the scope of the invention in any way. | 06-09-2011 |
| 20120141745 | SIMPLIFIED CONTROL OF COLOR SHIFTING PROPERTIES OF A CHIRAL LIQUID CRYSTAL POLYMER - A chiral liquid crystal precursor composition which comprises at least one salt that changes a position of the selective reflection band exhibited by the composition in a cured state compared to the position of a selective reflection band exhibited by a composition in the cured state that does not contain the at least one salt. This abstract is neither intended to define the invention disclosed in this specification nor intended to limit the scope of the invention in any way. | 06-07-2012 |
| 20120211564 | METHOD OF MARKING A DOCUMENT OR ITEM; METHOD AND DEVICE FOR IDENTIFYNG THE MARKED DOCUMENT OR ITEM; USE OF CIRCULAR POLARIZING PARTICLES - Optical identification and/or authentication of a document or item with the help of a marking comprising a random distribution of circular polarized light reflecting particles, the marking being applied to the document or item through an ink, and the reading device exploiting circular polarization to discriminate the flakes from the background. | 08-23-2012 |
| 20120328852 | SUBSTRATE WITH A MODIFIED LIQUID CRYSTAL POLYMER MARKING - The present invention relates to a marking on an item or substrate, which marking is based on a chiral nematic (also called cholesteric) liquid crystal precursor composition. Prior to curing the chiral liquid crystal precursor composition in the chiral liquid crystal state at least one optical property exhibited by the composition is modified by two modifying agents of different types in at least one area of the item or substrate. | 12-27-2012 |
