| Patent application number | Description | Published |
|---|
| 20100041551 | THERMALLY GATED PHOTOCHROMIC MEDIUM - The presently disclosed embodiments are directed to image forming mediums useful for reimageable and transient documents. More particularly, the embodiments pertain to an image forming medium comprising thermally gated photochromic materials comprising diarylethene (DAE) photochromes which avoid problems with unwanted reduction in color contrast due to background coloration. | 02-18-2010 |
| 20100086768 | PARTICLES WITH LIGHT ABSORBING MATERIAL FOR REIMAGEABLE MEDIUM - A plurality of particles including: (a) a binder; (b) a photochromic material; and (c) a light absorbing material. | 04-08-2010 |
| 20100216635 | REVERSE WRITE ERASABLE PAPER - An image-forming medium and methods for forming and imaging the medium are provided. The disclosed medium can be strongly colored under room illumination (or deliberate UV) and can be selectively discolored at an appropriate light wavelength to form an image. In one embodiment, the image-forming medium can include a substrate (e.g., a sheet of paper), a photochromic material incorporated with the substrate, and a photo-absorbing material incorporated with the photochromic material. Exemplary methods for using the image-forming medium to make a transient image can include first forming the image-forming medium by applying a coating solution containing photochromic material to the substrate or paper. The image-forming medium can have a medium color and can then be selectively exposed to a radiation through a mask to convert the photochromic material from a colored form to a colorless form and thus to form an image having a color contrast with its background. | 08-26-2010 |
| 20100227760 | REIMAGEABLE AND REUSABLE MEDIUM AND METHOD OF PRODUCING AND USING THE REIMAGEABLE AND REUSABLE MEDIUM - The present disclosure provides a reusable and reimageable medium including a substrate coated with a photochromic polymer. The photochromic polymer has a glass transition temperature ranging from 30° C. to 150° C., such as from about 30° C. to about 100° C., and the coated substrate converts to a colored state when both UV light and temperatures ranging from 30° C. up to 100° C. are applied to the coated substrate. The present disclosure also provides a method for producing and using the reusable and reimageable medium. | 09-09-2010 |
| 20110056282 | SENSORS AND METHODS FOR DETERMINING WHETHER AN ITEM HAS BEEN EXPOSED TO AN ENVIRONMENTAL CONDITION - A method for determining whether an item has been exposed to an environmental condition during a monitoring period. The method includes placing a sensor at least in proximity to the item at the beginning of the monitoring period so that the sensor will be exposed to a level of an environmental condition that can be correlated to an exposure level of the item to the environmental condition; reading the sensor; and determining from reading the sensor whether the item has been exposed to the environmental condition. The sensor includes a detecting material comprising a photochromic or photothermochromic material, the detecting material selected so that upon exposure to the environmental condition the detecting material exhibits a detectable color change. | 03-10-2011 |
| 20110082035 | PHOTOCHROMIC MATERIALS INCORPORATED IN POLYMER BACKBONE - Exemplary embodiments provide compositions and methods for making and using an erasable medium that can include a photochromic layer disposed over a substrate. The photochromic layer can include one or more photochromic molecule-polymer systems, wherein each of the one or more photochromic molecule-polymer systems can include a photochromic molecule covalently bonded within a polymer main chain, the photochromic molecule including one or more photochromic moieties (PM) linked together via a linker. | 04-07-2011 |
| 20110092364 | OLIGOMERIC SPIROPYRANS FOR ERASABLE MEDIUM APPLICATIONS - Exemplary embodiments provide compositions and methods for making and using an erasable medium that can contain oligomeric photochromic materials such as spiropyran oligomers, wherein the oligomeric photochromic material can include a plurality of photochromic groups such as spiropyrans covalently connected together by one or more linkers. | 04-21-2011 |
| 20110130279 | ERASABLE MEDIA WITH BINDER - Exemplary embodiments provide compositions and methods for an erasable medium that can include a photochromic composite containing a photochromic polymer dispersed in a polymer binder, a similar type polymer of a backbone portion of the photochromic polymer. | 06-02-2011 |
