Class 106/31.21 - The color former contains a heterocyclic oxygen ring

Subclass of Class 106 - Compositions: coating or plastic
Definition: Compositions wherein the color former contains a heterocyclic
No. of patents: 31
Last issue date: 02/19/2008

Number	Title	Issue Date
7332109	Thermally color-developing reversibly thermochromic pigment A thermally color-developing reversibly thermochromic pigment which shows a uniform color density in the coloring temperature range and also shows an optimal ΔH value within a range of from 3 to 40° C. Thermally color-developing reversibly thermochromic pigments o...	02/19/2008
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
7148128	Electronically addressable microencapsulated ink and display thereof We describe a system of electronically active inks which may include electronically addressable contrast media, conductors, insulators, resistors, semiconductive materials, magnetic materials, spin materials, piezoelectric materials, optoelectronic, thermoelectric o...	12/12/2006
7002728	Electrophoretic particles, and processes for the production thereof Copper chromite particles can advantageously be used as black particles in electrophoretic media and displays. Preferably, the copper chromite particles are coated with a silica coating and a polymer coating. ...	02/21/2006
6958848	Capsules, materials for use therein and electrophoretic media and displays containing such capsules An encapsulation material, intended for use in encapsulated electrophoretic displays, comprises the coacervation product of a polyanionic polymer having a vinyl main chain and a plurality of anionic groups bonded to the main chain, with a cationic or zwitterionic wa...	10/25/2005
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
6258747	Thermally sensitive recording medium A thermally sensitive recording medium having sufficient color developing density and which develops russet or wine red color. The recording medium incorporates a dye precursor which includes at least one red color developing leuco dye having a maximum ab...	07/10/2001
6071852	Pressure-sensitive record materials An internal phase solution for a coating of rupturable material for application to a base sheet to form a pressure-sensitive record material comprises one or more color-formers of which at least 90% are monoamino and/or diamino fluoran derivatives dissolv...	06/06/2000
6048387	Reversible thermochromic composition A reversible thermochromic composition is provided which contains a specified diazarhodamine lactone derivative as an electron-donating color-developing organic compound, an electron-accepting compound, and a reaction medium for causing an electron exchan...	04/11/2000
5931995	Ink compositions An ink comprised of (1) a liquid aldehyde, a liquid acid, or mixtures thereof, (2) a solid additive aldehyde compound, a solid additive acid compound, or mixtures thereof, (3) a lightfastness UV absorber, (4) a lightfastness antioxidant, and (5) a coloran...	08/03/1999
5902390	Ink compositions containing ketones An ink comprised of (1) a liquid ketone, (2) a solid ketone, (3) a lightfastness UV absorber, (4) a lightfastness antioxidant, and (5) a colorant....	05/11/1999
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
5633109	Ink compositions with liposomes containing photochromic compounds Disclosed is an ink composition which comprises an aqueous liquid vehicle, a photochromic material, and a vesicle-forming lipid, wherein vesicles of the lipid are present in the ink....	05/27/1997
5605650	Security of articles, goods, vehicles or premises A method is disclosed for detecting tampering, comprising applying to at least a portion of a surface of an object a composition comprising at least one fluorescent material and a solvent medium for the fluorescent material, the solvent medium containing ...	02/25/1997
5383959	Reversible inks Photochromic ink comprising a spiroheterocycle or metal dithiozonate photochromic dye....	01/24/1995
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
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
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
4747875	Chromogenic azaphthalide compound and a colour-forming recording composition containing the same Disclosed herein is a chromogenic compound of the formula: ##STR1## wherein R1, R2, R3 and R4 respectively represent an alkyl group having 1 to 4 carbon atoms; R5 represents an alkyl group having...	05/31/1988
4547222	High print intensity marking fluid A liquid internal phase for use in encapsulated particles to produce high intensity marks includes an organic solvent having a specific amount of colorless chromogenic material and a larger amount of alkylated benzene material to yield a blue mark, and a ...	10/15/1985
4503177	Stabilization of photochromic compounds, and the use of stabilized photochromic compounds The stabilization of selected photochromic compounds, selected from certain fulgides and fulgimides, is made possible by associating with such compounds a clay mineral having an expanding crystal lattice, which can stabilize a selected photochromic compou...	03/05/1985
4399849	Quality control process The invention provides a quality control process for lumber-cutting operations. It normally includes the following steps: (1) treating, with a normally invisible indicator, a portion of the lumber to be cut; (2) recording the physical properties of the po...	08/23/1983
4372582	Stabilizer for electron doner-acceptor carbonless copying systems A stabilizing agent for use in electron donor-acceptor carbonless copying systems. The stabilizing agent is 2,2'-methylene-bis(4-methyl-6-t-butyl phenol). Systems in which the stabilizing agent is useful comprise a color-forming composition comprising at ...	02/08/1983
4363664	Novel compositions and processes Stable, concentrated, free-flowing aqueous dispersion compositions containing one or more colorless dyestuff precursors and one or more surface active agents, are useful in the manufacture of paper for pressure sensitive carbonless duplicating manifold sy...	12/14/1982
4362565	Color former composition A solid color former composition is produced in a low-dusting form by admixture with 0.1 to 10% by weight, based on the weight of the color former, of an organic hydrophobic liquid or low melting solid, which does not react with the color former....	12/07/1982
4355823	Pressure-sensitive or heat-sensitive recording material The present invention relates to a pressure-sensitive or heat-sensitive recording material which contains as color former in its color-forming system at least one carbazolylmethane compound of the general formula ##STR1## wherein each of R1	10/26/1982
4339275	Color developable composition A composition for coating a substrate for use in an image wise developable or transferal system comprises (I) a free base of a cationic solvent dye capable of developing a color or at least a more intense color upon reaction with an organic acid developin...	07/13/1982
4211436	Pressure-sensitive recording material A pressure-sensitive and heat-sensitive recording material contains color-forming agents of the formula ##STR1## wherein R1 denotes hydrogen or a non-ionic radical which is free from amino groups, R2 denotes hydroxyl, alkylamino...	07/08/1980
4171982	Acid indicator based high saturation sympathetic ink having time delayed disappearance Disclosed is an ink that is intensely colored in solution with the vehicle of the ink. The ink "disappears" or becomes invisible to the naked eye after a period of time has elapsed from the application of the ink to a record document, the ink being utiliz...	10/23/1979
4132436	Recording material A recording material comprising (1) at least one thiazine compound capable of forming a color when contacted with an electron accepting material and represented by the following general formula (I): ##STR1## wherein A1 and A2, w...	01/02/1979
4072690	Indolyl methylene leuco dyestuffs Indolyl methylene leuco dyestuffs of the formula ##STR1## wherein X1 and X2 independently of the other, represent alkyl with 2 to 12 carbon atoms, alkenyl with at most 12 carbon atoms or phenylalkyl with 1 to 4 carbon atoms in t...	02/07/1978

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Class 106/31.21 - The color former contains a heterocyclic oxygen ring