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| Number | Title | Issue Date |
| 7329630 | Stabilizers and anti-fade agents for use in infrared sensitive leuco dye compositions Compositions and methods for production of color images having increased light stability and reduced browning are described. The color forming composition can include a leuco dye, an infrared absorber, and at least one of a stabilizer and an anti-fade agent. The col... | 02/12/2008 |
| 7252708 | Fluorescent water-base ink for ink-jet recording A fluorescent water base ink for ink-jet recording contains a first fluorescent dye and a second fluorescent dye. The first fluorescent dye has a first ultraviolet absorption wavelength region in an absorption spectrum and a first fluorescence emission wavelength re... | 08/07/2007 |
| 7217297 | Composition for dyeing keratin fibers comprising a defined diheteroylarylmethane direct dye or a leuco precursor of this dye and dyeing method using it Composition for dyeing keratin fibers, for example, human keratin fibers such as the hair, which comprises at least one compound chosen from among the direct dyes of the heteroylarylmethane type defined herein, including diheteroylarylmethane and leuco precursors th... | 05/15/2007 |
| 7211117 | Composition for dyeing keratin fibers comprising at least one dye chosen from monoheteroyldiarylmethane direct dyes and the leuco precursors thereof and dyeing method using it A composition for dyeing keratin fibers, for example, human keratin fibers, such as hair, comprising at least one dye chosen from heteroyldiarylmethane type direct dyes, for example, monoheteroyidiarylmethane direct dyes, and the leuco precursors thereof; and also t... | 05/01/2007 |
| 7147699 | Ink jet printing compositions and methods An ink composition is provided which is suitable for use in an ink jet printer and comprises solvent, colourant and binder, wherein the solvent comprises methyl acetate. The composition is particularly suitable for printing on polymeric substrates, eg polypropylenes... | 12/12/2006 |
| 7033581 | Method of treating hair with heat and a cap which provides a signal regarding treatment A hair covering which comprises a woven or nonwoven substrate comprising synthetic or natural materials, which are impregnated, or coated, or both, with a mutable dye is described. ... | 04/25/2006 |
| 7028634 | Worklight with thermal warning An enhanced built-in visual warning mechanism to caution a user when the surfaces of a worklight are hot. A worklight is shown that has a housing that includes an interior portion for holding a light source such as one or more quartz halogen bulbs. The light source ... | 04/18/2006 |
| 7021846 | Method and apparatus for producing laminated labels A method of printing an image on a composite medium is described. A composite medium comprises a thermally sensitive image receiving layer and a protective layer. The image receiving layer is activated through the protective layer whereby to generate an image in the... | 04/04/2006 |
| 6890377 | Thermochromic rylene dyes Rylene dyes of the general formula I where R is hydrogen; unsubstituted or substituted C1-C30-alkyl, aryl or hetaryl; R′ is unsubstituted or substituted C2-C... | 05/10/2005 |
| 6846619 | Dye dispersion liquid and thermosensitive recording material using the same There is provided a leuco dye dispersion liquid for a thermosensitive recording material wherein the leuco dye is being dispersed with an anionic surfactant and an nonionic surfactant, while average particle diameter of the leuco dye ranges from 0.10 μm to 0.30 μm... | 01/25/2005 |
| 6793721 | Invisible ink composition and method to ensure document confidentiality An invisible ink composition and a method to ensure document confidentiality. The invisible ink composition includes a carrier as a solvent; and at least one leuco dye evenly dispersing in the carrier. The invisible ink becomes visible while the leuco dye is combine... | 09/21/2004 |
| 6566302 | Monophase solid solutions comprising a plurality of color former compounds and process for their preparation A monophase solid solution comprising a plurality of color formers selected from the group consisting essentially of the fluoran type, phthalide type, phenoxazine type, phenothiazine type, rhodamine lactam type, leuco-auramine type, triphenylmethane type,... | 05/20/2003 |
| 6489375 | Low VOC cationic curable lithographic printing inks An Offset Lithographic Printing Process employing low VOC lithographic printing ink formulations containing monomeric diluents, curable by cationic polymerization in the presence of fountain solution and resin rheology modifiers compatible with cationic c... | 12/03/2002 |
| 6124377 | Marking system A marking system that advantageously minimizes messiness during use is disclosed. The marking system comprises a marking composition comprising at least one color precursor in the form of a leuco dye. A marking instrument can be utilized to store the mark... | 09/26/2000 |
| 5935308 | Latent image jet inks A latent image printing process by applying to a substrate a latent image ink composition containing zinc bromide with an ink jet printer. Subsequently, the latent image is activated to render it visible, by application of an activator.... | 08/10/1999 |
| 5693693 | Bar code printing and scanning using wax based invisible fluorescent inks Wax based invisible inks have been discovered that emit light at various wavelengths in the visible region when they are excited by UV light. This allows lower layer clear text information to be written on an object with a regular, visible ink and an uppe... | 12/02/1997 |
| 5662735 | Chemical solution for detecting counterfeit paper currency This invention relates to a solution for detecting counterfeit paper currency. The solution contains iodine at a concentration of from 0.005 to 3 grams/liter and one or more solvents selected from the groups consisting of: alcohols, ketones, polyalcohols,... | 09/02/1997 |
| 5637552 | Process for producing neutral to alkali color developer pigments A process is described for producing neutral to alkaline color developer pigments for use in carbon-free transfer papers from an acid-activated smectic phyllosilicate and basically reacting chemicals. The process is characterized in that the acid-activate... | 06/10/1997 |
| 5527385 | Thermochromic composition A thermochromic composition which comprises (1) an electron-donating chromogenic organic compound, (2) an electron-accepting compound, (3) at least one desensitizer selected from among hydrazide compounds, and (4) a thermochromic transition temperature modifier.... | 06/18/1996 |
| 5464803 | Pressure-sensitive record material A chromogenic composition for use in pressure-sensitive record material comprises chromogenic material in a vegetable oil vehicle. The vehicle is made up of at least a major proportion of relatively high melting vegetable oil which is solid or semi-solid ... | 11/07/1995 |
| 5395432 | Security jet ink A latent image printing process comprising applying to a substrate a latent image ink composition, with an ink jet printer. Subsequently, the latent image is activated to render it visible, by application of an activator. The present invention also provid... | 03/07/1995 |
| 5383959 | Reversible inks Photochromic ink comprising a spiroheterocycle or metal dithiozonate photochromic dye.... | 01/24/1995 |
| 5350857 | Thiazolo[5,4-D]thiazsole Color-formers This invention relates to improved imaging systems based on the formation of green-yellow colored coordination compounds of transition metals with certain ligands. The formation of colored coordination compounds can be employed to generate images and is i... | 09/27/1994 |
| 5304587 | Water resistant security ink composition A security composition for use with an ink composition including diphenyl guanidine and acrylic resin. The ink composition may further include a glycol ether and a plasticizer and can be printed on paper, for example in the word "VOID". If bleach is used ... | 04/19/1994 |
| 5290346 | Ink for printer An ink for an ink jet printer capable of decoloring a recorded image or changing a color of the recorded image to thereby save resources, improve economy, and improve functionality. As a coloring composition of the ink, an organoboron salt of cyanine dye ... | 03/01/1994 |
| 5215956 | Color changing print In the color changing print of this invention, plural areas are printed by using plural types of color changing inks which develop into different colors from the substantially invisible colorless state by reaction with a color changing agent. By the emerg... | 06/01/1993 |
| 5210064 | Stabilization of thermal images The addition, to a thermal imaging medium comprising a color-forming compound which undergoes a change of color upon heating above a color-forming temperature for a color-forming time, the color-forming compound being of the cyclic sulfonamide type descri... | 05/11/1993 |
| 5206208 | Stabilization of thermal images The addition, to a thermal imaging medium comprising a color-forming compound which undergoes a change of color upon heating above a color-forming temperature for a color-forming time, the color-forming compound being of the cyclic sulfonamide type described i... | 04/27/1993 |
| 5204311 | Ethanediimidic acid bis[(arylalkylidene)hydrazide] color-formers This invention relates to improved imaging systems based on the formation of yellow colored coordination compounds of transition metals with certain ligands. The formation of colored coordination compounds can be employed to generate images and is importa... | 04/20/1993 |
| 5196243 | Printed matter Printed matters are disclosed, which are printed with the coloring ink that is able to do the short-time fading at which time the color is losen of itself in a relatively short time after once having developed color by interacting with the coloring assist... | 03/23/1993 |
| 5139572 | Reusable hidden indicia printed sheet A print of this invention has a color-forming area and a discoloring area. The color-forming area is printed by an ink containing a first color-changing agent which changes from substantially invisible colorlessness to visibleness by applying a color form... | 08/18/1992 |
| 5094688 | Triarylmethane color-forming agents Color-forming agents of the present formula ##STR1## wherein X denotes hydroxyl, alkoxy, alkenyloxy, aralkoxy, cycloalkoxy, aryloxy, acyloxy, alkylamino, dialkylamino, acylamino, aralkylamino or arylamino, R denotes alkyl, alkenyl or aralkyl, R1... | 03/10/1992 |
| 5087283 | Sympathetic ink for ink jet printer Sympathetic ink compositions particularly adapted for use with high speed, non-impact ink printing equipment are disclosed, together with methods of use and development thereof. The inks of the invention are water-based and include of from about 4-20% by ... | 02/11/1992 |
| 5066633 | Sensitizer for heat sensitive paper coatings A heat sensitive coating has a colorless or light colored leuco dye precursor, preferably having a five-membered spirol lactone ring at one end of the molecule, and a tertiary amino group at another end of the molecule, and a developer. Sensitizers which ... | 11/19/1991 |
| 5058925 | Leach resistant ink for protecting documents from alteration and document protected thereby An initially colorless, chemically sensitive protective ink which can be readily printed or applied onto a document substrate and which reacts upon contact with an oxidizing agent to form a noticeable color change is provided. The protective ink, when pri... | 10/22/1991 |
| 5057154 | Leuco dyes and recording material employing the same A leuco dye of the formula (I): ##STR1## wherein R1, R2, R3, R4, R5, R6, R7, and R8 each represent a lower alkyl group; A represents ##STR2## in which R... | 10/15/1991 |
| 5024699 | Leuco dyes and recording materials using the same A leuco dye having the formula ##STR1## wherein R1, R2, R3 and R4 each represent a lower alkyl group; R5 represents an -naphthyl group, ଲ-naphthyl group or ##STR2## wherein... | 06/18/1991 |
| 4923641 | Highly concentrated stable solutions of color-forming agent: for pressure-sensitive recording materials Highly concentrated stable solutions of color-forming agents of the general formula ##STR1## wherein x denotes hydroxyl, alkoxy, alkenyloxy, aralkoxy, cycloalkoxy, aryloxy, acyloxy, alkylamino, dialkylamino, acylamino, aralkylamino or arylamino ... | 05/08/1990 |
| 4917730 | Prevention of spotting in thermal imaging compositions Thermally imageable composition comprising (a) at least one leuco dye, (b) a nitrate salt, (c) at least one base having a conjugate acid having pKa equal to or greater than zero. The base serves to prevent spotting or backgrounding of transparency films b... | 04/17/1990 |
| 4812171 | Irreversible photochromic markings A photochromic ink composition which comprises a solution of a 1,2-dihydroquinoline (DHQ) in a polymer solution, the dihydroquinoline being sensitive or sensitized to ultra-violet light.... | 03/14/1989 |
