Furanone Moiety-containing Patents (Class 503/220)
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Patent number: 7704667Abstract: There are described novel rhodamine dye compounds and imaging members and imaging methods, including thermal imaging members and imaging methods, utilizing the compounds. The dye compounds exhibit a first color when in the crystalline form and a second color, different from the first color, when in the liquid, amorphous form.Type: GrantFiled: January 30, 2008Date of Patent: April 27, 2010Assignee: Zink Imaging, Inc.Inventors: Kap-Soo Cheon, Stephen J. Telfer, Michael P. Filosa, John L. Marshall, Fariza B. Hasan, David A. Skyler, John M. Hardin
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Publication number: 20090215621Abstract: A method for creating color images is provided. This method includes providing at least one color precursor, wherein the color precursor is contained within microcapsules of predetermined sizes or variable sizes; providing a substrate, wherein the substrate is coated with at least one-color-triggering developer; depositing the microcapsules on the surface of the substrate; and creating an image on the substrate by applying pressure to the microcapsules in a controlled manner, wherein the pressure is sufficient to rupture the microcapsules, wherein rupturing the microcapsules releases the color precursor for reacting with the color-triggering developer, and wherein the reaction of the color precursor with the color-triggering developer creates color on the surface of the substrate.Type: ApplicationFiled: February 27, 2008Publication date: August 27, 2009Applicant: ELMER'S PRODUCTS, INC.Inventor: Sandra Lynn Jackson
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Patent number: 7569515Abstract: An erasable image forming material includes a color former containing crystal violet lactone, a developer, a first binder resin of styrene-butadiene copolymer and a second binder resin of a styrene-based resin containing ?-methylstyrene, the first and second binder resins being in a compatible state.Type: GrantFiled: February 15, 2008Date of Patent: August 4, 2009Assignee: Kabushiki Kaisha ToshibaInventors: Satoshi Takayama, Kenji Sano, Takeshi Gotanda, Yumiko Sekiguchi
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Patent number: 7557065Abstract: The invention provides a heat-sensitive recording material, which is highly sensitive, is almost free of staining on the background, and gives a recorded image excellent in stability during storage, by using a finely divided sensitizer dispersion excellent in shelf stability produced in a short time with high volumetric efficiency. The invention relates to a method of producing a sensitizer dispersion, which comprises emulsifying and finely dividing a heat-sensitive recording sensitizer by melting under heating in an aqueous emulsifying dispersant, and then crystallizing the finely divided emulsified dispersion under rapid cooling, wherein the sensitizer is at least one member selected from the group consisting of 1,2-bis(phenoxy)ethane, 1,2-bis(3-methylphenoxy)ethane, 1,2-bis(4-methylphenoxy)ethane, p-benzylbiphenyl, di-p-methylbenzyl oxalate, and ?-naphthyl benzyl ether.Type: GrantFiled: April 8, 2004Date of Patent: July 7, 2009Assignee: Sanko Co., Ltd.Inventors: Shigeru Oda, Eiji Kawabata, Takaaki Mori, Tjang Kie Tan, Hiroshi Sumitomo, Yoshito Nakagawa
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Publication number: 20080194403Abstract: A laser recording thermally sensitive recording medium comprising, at least a photo absorbing material which absorbs laser ray and covert the laser ray to heat, colorless or pale colored basic leuco dye and organic color developing agent on a substrate as main components, wherein said photo absorbing material is a compound represented by general formula (1), wherein, n indicates an integer of from 1 to 4, and structural formula of Xn, Yn and Zn? are indicated in Table 1.Type: ApplicationFiled: January 13, 2005Publication date: August 14, 2008Inventors: Junpei Natsui, Yoshihide Kimura, Kenji Hirai
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Publication number: 20080182749Abstract: To provide a thermosensitive recording material that is superior in uniformity, makes it possible to obtain images with high glossiness and has less curl, in which a synthetic paper having a multilayer structure serves as a support. Specifically, there is a thermosensitive recording material including: a support, and a thermosensitive recording layer containing a leuco dye and a color developer on the support, wherein the support is a synthetic paper having a multilayer structure, and an inorganic pigment is contained only in a base layer of the synthetic paper; also, two layers which are formed solely of polypropylene and which contain no inorganic pigment are laid one on top of the other on the base layer containing an inorganic pigment; further, all layers are biaxially stretched.Type: ApplicationFiled: January 14, 2008Publication date: July 31, 2008Inventors: Hiroshi TOHMATSU, Hideo Aihara, Shinji Okada, Ichiro Sawamura, Hirokazu Watari
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Publication number: 20080139385Abstract: A thermally sensitive recording medium laminating a protecting layer on a thermally sensitive recording layer containing a colorless or pale colored electron donating leuco dye and electron accepting color developing agent, said thermally sensitive recording layer is formed on a substrate, and said protecting layer is comprising a resin that contains a carboxyl group, epichlorohydrin resin and modified polyamine/amide resin, and said thermally sensitive recording medium exhibits sufficient resistance against water such as rain or humidity, further excellent in printing run-ability (head debris and sticking) and sensitivity.Type: ApplicationFiled: December 6, 2005Publication date: June 12, 2008Inventors: Akihito Ogino, Seiki Yoneshige, Junpei Natsui, Jun Makihara, Naoki Negishi
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Patent number: 7381684Abstract: A method for using a rewritable thermal label of the non-contact type which comprises recording and erasing information repeatedly in accordance with a non-contact method on a rewitable thermal label which remains attached to an adherend. The label contains (a) an anchor coat layer comprising a crosslinked resin, (b) a heat-sensitive color development layer, (c) a light absorption and a photo-thermal conversion layer and (d) an adhesive layer. The layers (a), (b), (c) and (d) are laminated on a first face of a substrate successively. The anchor coat layer is placed next to the substrate. The layer (c) is an outermost layer. The adhesive layer is placed on a second face of the substrate.Type: GrantFiled: March 29, 2005Date of Patent: June 3, 2008Assignee: Lintec CorporationInventors: Tatsuya Tsukida, Tetsuyuki Utagawa
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Patent number: 7354885Abstract: An erasable image forming material includes a color former containing crystal violet lactone, a developer, a first binder resin of styrene-butadiene copolymer and a second binder resin of a styrene-based resin containing a-methylstyrene, the first and second binder resins being in a compatible state.Type: GrantFiled: September 18, 2006Date of Patent: April 8, 2008Assignee: Kabushiki Kaisha ToshibaInventors: Satoshi Takayama, Kenji Sano, Takeshi Gotanda, Yumiko Sekiguchi
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Patent number: 7329630Abstract: 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 color forming compositions can be stabilized such that less than about a 30% decrease in optical density occurs over a three year period. The stabilizers can include chroman, thiolane-nickel complexes, spiroindanes, while suitable anti-fade agents can include vitamin E, vitamin E analogs, astaxanthin, chroman, ascorbic acid, carotene, and mixtures thereof. The color forming compositions are ambient light stable and are useful in forming images on a wide variety of substrates such as optical disks.Type: GrantFiled: September 5, 2003Date of Patent: February 12, 2008Assignee: Hewlett-Packard Development Company, L.P.Inventor: Makarand P. Gore
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Patent number: 7270865Abstract: Systems and methods of labeling optical disk recording media using black leuco dyes in an electromagnetic radiation sensitive composition are described. Black leuco dyes containing isobenzofuranone are prepared in various compositions that can include activators, radiation absorbers, non-leuco colorants, and/or a variety of carriers. The leuco dye compositions can be applied and prepared to achieve a desired visual effect upon development of the black leuco dye.Type: GrantFiled: February 10, 2003Date of Patent: September 18, 2007Assignee: Hewlett-Packard Development Company, L.P.Inventor: Makarand P. Gore
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Patent number: 7125824Abstract: A linerless label system comprising pressure adhesive coating, release coating and thermal imaging coating is described. The thermal imaging coating contains as one of its components the compounds of the formula (I) wherein R1 and R2 are selected from methyl, ethyl, aryl, aryl substituted with methyl, ethyl, methoxy, ethoxy or halogen, benzyl or benzyl with phenyl substituted with methyl, ethyl, methoxy, ethoxy or halogen, R3,R4,R5 and R6 are selected from hydrogen, halogen, methyl, ethyl, methoxy, ethoxy, phenyl, R7 and R8 are each independently selected from methyl or ethyl, R9 is selected from hydrogen, methoxy or ethoxy, R10 is selected from hydrogen, dimethylamino or diethylamino, R11 is methyl. The imaged linerless label according to the invention has been a bar reflectance of less than 20 at 670 nanometers, a print control contrast signal of at least 80 and a BNL background of at least 75%.Type: GrantFiled: May 19, 2004Date of Patent: October 24, 2006Assignee: Appleton Papers Inc.Inventors: Ponnampalam Mathiaparanam, Mark Robert Fisher, Stacey Ann Justa MacNeil
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Patent number: 6956010Abstract: A rewritable thermal label of the non-contact type which comprises an anchor coat layer comprising a crosslinked resin, a heat-sensitive color development layer and a light absorption and photo-thermal conversion layer which are laminated on one face of a substrate successively, the anchor coat layer being placed next to the substrate, and an adhesive layer placed on the other face of the substrate and allows recording and erasure of information repeatedly in accordance with the non-contact method; and a method for using a rewritable thermal label of the non-contact type which comprises recording and erasing information repeatedly in accordance with the non-contact method on the rewritable thermal label which remains attached to an adherend. Information can be recorded and erased repeatedly on the label which remains attached to the adherend and the label can be recycled together with the adherend.Type: GrantFiled: September 30, 2002Date of Patent: October 18, 2005Assignee: Lintec CorporationInventors: Tatsuya Tsukida, Tetsuyuki Utagawa
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Patent number: 6908505Abstract: Thermochromic compositions that include combinations of at least one color former and at least one Lewis acid in a polymer mixture are disclosed. The thermochromic compositions reversibly change appearance from substantially transparent to substantially non-transparent above a lower critical solution temperature.Type: GrantFiled: October 1, 2003Date of Patent: June 21, 2005Assignee: Spectra Systems CorporationInventors: Nabil M. Lawandy, Timothy J. Driscoll, Charles M. Zepp
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Patent number: 6900158Abstract: A high-molecular weight gel having a leuco dye represented by the formula (L-1) as defined herein, connected thereto by covalent bond or single bond, and a high-molecular weight gel represented by the formula (R-1) as defined herein.Type: GrantFiled: March 19, 2003Date of Patent: May 31, 2005Assignee: Fuji Photo Film Co., Ltd.Inventors: Takashi Katoh, Akinori Fujita
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Patent number: 6890880Abstract: A heat-sensitive recording material includes a support having disposed thereon a heat-sensitive layer including microcapsules, which contain an achromic or hypochromic electron-donating dye precursor, and a developer, wherein the microcapsules contain at least one metal compound.Type: GrantFiled: September 6, 2002Date of Patent: May 10, 2005Assignee: Fuji Photo Film Co., Ltd.Inventors: Hisao Yamada, Naoto Yanagihara, Kazumori Minami
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Patent number: 6693061Abstract: A light-permeable thermosensitive recording material having a light permeable support and a thermosensitive recording layer formed thereon and including a leuco dye, a color developer for the leuco dye, and a binder resin, wherein the developer is a compound represented by the following formula (1): wherein R1 represents an alkyl group having 4-16 carbon atoms or an aminoalkyl group having 4-16 carbon atoms.Type: GrantFiled: November 21, 2001Date of Patent: February 17, 2004Assignee: Ricoh Company, Ltd.Inventors: Hitoshi Shimbo, Hideo Suzaki, Masafumi Torii, Masaru Shimada
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Patent number: 6613716Abstract: A coating composition is applied to a print stock substrate for preparing a thermally-active layer, the coating composition comprising: a developer comprising at least one or a combination of 6′-dipentylamino-3′-methyl-2′(phenylamino)-spiro [isobenzofuran-1(3H),9′-[9H]xanthen]-3-one (CAS No. 129473-78-5) and 6′-dibutylamino-3′-methyl-2′(phenylamino)-spiro [isobenzofuran-1(3H),9′-[9H]xanthen]-3-one (CAS No. 89331-94-2); a sensitizer comprising at least one or a combination of 1,1′-sulfonylbisbenzene (CAS No. 127-63-9) and dimethylterephthalate (CAS No. 120-61-6); and a coreactant (or developer) comprising at least one or a combination of bis(4-hydroxyphenyl)-4-methylpentane (CAS No. 6807-17-6) and 4-hydroxy-4′-isopropoxydiphenylsulfone (CAS No. 95235-30-6). Preferably, the print stock substrate will be coated with clay or the like to provide a smooth coating surface for the thermally-active layer.Type: GrantFiled: March 28, 2001Date of Patent: September 2, 2003Assignee: Miami Wabash Paper LLCInventors: Eugene V. Hoefs, Regina A. Kleinhenz
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Patent number: 6566302Abstract: 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, spiropyran type, benzoxazine type, quinazoline type of color formers and mixtures thereof, preferably wherein the color forming materials are selected from the fluoran and phthalide type of color former and mixtures thereof.Type: GrantFiled: February 26, 2001Date of Patent: May 20, 2003Assignee: Ciba Specialty Chemicals CorporationInventors: James Philip Taylor, Michael Heneghan
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Patent number: 6395681Abstract: Chromogenic compounds of colorless or lightly colored form are disclosed having the following structural formula: wherein E represents a six-membered aromatic or heterocyclic ring which may have an aromatic condensed ring and both the E ring and the condensed ring may be substituted. Each of R1, R2, R3 and R4 independently represents hydrogen, alkyl of not more than 12 carbon atoms which is unsubstituted or substituted by halogen, hydroxyl, cyano or lower alkoxy or represents cycloalkyl, phenyl, benzyl, or phenyl or benzyl which is substituted by halogen, lower alkyl or lower alkoxy or R1 and R2 or R3 and R4 together with the nitrogen atom to which they are attached represent a 5- or 6-membered heterocyclic radical. Each of R7 and R8 independently represents hydrogen, lower alkyl, lower alkoxy or halo. The compounds of this invention are eligible for use in pressure-sensitive and heat-sensitive record materials and manifold marking systems.Type: GrantFiled: September 22, 1986Date of Patent: May 28, 2002Assignee: Appleton Papers Inc.Inventors: Seishi Ikegami, Takamichi Amako
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Patent number: 6391824Abstract: A non-impact, thermal transfer printing sheet having a base sheet of fibrous paper or synthetic with or without a security device, coated with a composition comprising (1) lactone, spiropyrane coloration, or an iron metallic complexes that reacts with weak an organic acid to produce coloration when the sheet is heated via a thermal head, (2) an activator to accelerate the reaction, (3) absorbent materials to absorb the resulting products of the reaction, and (4) an inorganic phosphorescent ZnS:Cu pigment having a particle size sufficient to produce phosphorescence in a predetermined time and wave-length and a process of making thereof are disclosed. The sheet is capable of being printed using a thermal transfer printing head and providing phosphorescence when activated by ultraviolet light containing wavelengths of between 440 and 640 nm.Type: GrantFiled: March 6, 2000Date of Patent: May 21, 2002Assignee: Keylink Gestao E Investimentos LDA.Inventor: Pedro Margarit Daroca
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Patent number: 6310002Abstract: A novel pressure sensitive record material suitable for use for high temperature reprographic equipment is disclosed comprising a sheet support carrying isolated droplets of an oil solution of chromogenic material, said isolated droplets being confined within respective pressure rupturable barriers, and, on the opposite surface of the same sheet or on a different sheet support, a coating of a acidic developer material effective to develop the color of the chromogenic material in solution on contact, wherein, the pressure rupturable barrier comprises microcapsules having a wall material formed from polymerization of melamine and formaldehyde, methylol melamine methylated methylol melamine, urea and formaldehyde, dimethylol urea or methylated dimethylol urea, with a copolymer of acrylic acid and alkyl acrylate; the oil solution comprises a blend of (i) a vegetable oil having a degree of unsaturation greater than 30% such as canola oil, soybean oil, corn oil, sunflower oil, or cottonseed oil with (ii) alkyl esteType: GrantFiled: March 7, 2000Date of Patent: October 30, 2001Assignee: Appleton Papers Inc.Inventors: Michael Curley Krzoska, Troy Ronald Seehafer
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Patent number: 6284707Abstract: The thermally sensitive recording medium having sufficient color developing density and develops navy blue or grayish blue color. The color difference L* value a* value and b* value of developed image of said thermally sensitive recording medium regulated by JIS-Z-8729 are within the regions of, A. L* value is 30˜50, a* value is −15˜0 and b* value is −30˜10, B. L* value is 30˜50, a* value is 0˜10 and b* value is −30˜0 or C. L* value is 30˜50, a* value is 10˜20 and b* value is −30˜15.Type: GrantFiled: June 30, 1999Date of Patent: September 4, 2001Assignee: Nopon Paper Industries Co LtdInventors: Yoshimi Midorikawa, Kaoru Hamada, Yoshihide Kimura, Tomoaki Nagai
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Patent number: 6284706Abstract: The thermally sensitive recording medium having sufficient color developing density and develops sepia color or light brown color. The color difference a* value of developed image of said thermally sensitive recording medium regulated by JIS-Z-8729 is within the region of 0˜40 and b* value is within the region of 0˜55.Type: GrantFiled: May 19, 1999Date of Patent: September 4, 2001Assignee: Nippon Paper Industries Co LtdInventors: Yoshimi Midorikawa, Kaoru Hamada, Yoshihide Kimura, Tomoaki Nagai
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Patent number: 6258747Abstract: 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 absorption wavelength of 480 to 570 nm and at least one black color developing leuco dye with maximum absorption wavelengths at 420 to 480 nm and 550 to 640 nm. The color difference a* value of developed image of said thermally sensitive recording medium, measured according to JIS-Z-8729 is within the region of 0 to 50 and b* value is within the region of −15 to 10.Type: GrantFiled: June 16, 1999Date of Patent: July 10, 2001Assignee: Nippon Paper Industries Co LtdInventors: Yoshimi Midorikawa, Kaoru Hamada, Yoshihide Kimura, Tomoaki Nagai
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Patent number: 6239068Abstract: A process of forming a diffusion resistant lenticular element comprising: a) contacting at least one dye-donor element comprising a support having thereon a dye layer comprising an image dye in a binder having an infrared-absorbing material associated therewith, the image dye comprising a nonionic dye capable of being converted to a cationic dye by means of an acid, with a lenticular element comprising a first support having thereon a lenticular array on the opposite side thereof; b) imagewise-heating the dye-donor element by means of a laser; c) transferring a dye image to the first support of the lenticular element; d) contacting the dye image with a mordanting element comprising a second support having thereon in order, a release layer and an adhesive layer of an acidic polymer having a Tg less than about 80° C.Type: GrantFiled: September 23, 1999Date of Patent: May 29, 2001Assignee: Eastman Kodak CompanyInventors: Lee W. Tutt, Christine M. Vargas, John Agostinelli
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Patent number: 6221806Abstract: A diffusion resistant lenticular element comprising a first support having thereon a lenticular array, the element having thereon a protective element comprising a second support having thereon an adhesive layer of an acidic polymer having a Tg less than about 80° C., the adhesive layer of the protective element being on the side of the first support which does not contain the lenticular array, the adhesive layer containing a laser-induced, cationic dye image.Type: GrantFiled: September 23, 1999Date of Patent: April 24, 2001Assignee: Eastman Kodak CompanyInventors: Lee W. Tutt, Christine M. Vargas, Teh-Ming Kung
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Patent number: 6090748Abstract: A reversible thermosensitive recording material which includes a recording layer including an electron donating coloring agent and an electron accepting coloring developer and in which an image is reversibly formed and erased by appropriately heating and cooling the recording layer, wherein the recording material has an image density retention not less than about 60% when the recording material having an image is allowed to settle in a dry place at 50.degree. C. for 24 hours, a residual image density not greater than about 0.03 when the recording material having an image is heated at 110.degree. C. for 0.5 seconds to erase the image, and a residual image density after light irradiation not greater than about 0.04 when the recording material having an image is heated at 110.degree. C. for 0.5 seconds to erase the image after light of 5,000 lux is irradiated to the recording material for 100 hours.Type: GrantFiled: June 25, 1998Date of Patent: July 18, 2000Assignee: Ricoh Company, Ltd.Inventors: Hiromi Furuya, Tadafumi Tatewaki, Masafumi Torii, Fumio Kawamura, Hiroaki Matsui, Masaru Shimada, Kyoji Tsutsui
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Patent number: 5880064Abstract: A carbonless pressure-sensitive copying paper which uses a solvent free of an unpleasant odor and friendly to environments and is excellent in color formability and image keeping properties, the copying paper having a layer containing microcapsules enclosing a color former dissolved in a solvent, the solvent being a middle-length-chain triglyceride (MCT), the color former being an indolylazaphthalide compound or a fluoran compound having a trifluoromethylanilino group, the color former further containing a color former different in kind, the solvent further containing a specific fatty acid ester solvent in combination with the MCT, and the color developer being an inorganic color developer, preferably a simi-synthetic solid acid.Type: GrantFiled: April 23, 1997Date of Patent: March 9, 1999Assignee: Mitsubishi Paper Mills Ltd.Inventors: Nobuhiro Kagota, Hironori Wada
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Patent number: 5811367Abstract: Pressure-sensitive copying material comprises a substrate carrying isolated droplets of an oil solution of chromogenic material confined within respective pressure-rupturable barriers. The chromogenic material develops a colour other than blue or black on contact with colour developer and comprises a component which is fluorescent. This enables the authenticity of the copying material to be verified by irradiation with ultra-violet light to produce fluorescence. The fluorescent material can be, for example 2,2-bis(4-{2-?4-diethylaminophenyl!-quinazolin-4-yloxy}phenyl) propane or 1-(3-methoxy-4-dodecyloxyphenyl)-2-(2'-quinolyl)ethylene. Non-fluorescent chromogenic material(s) are preferably used in combination with the fluorescent chromogenic material(s).Type: GrantFiled: October 28, 1996Date of Patent: September 22, 1998Assignee: The Wiggins Teape Group LimitedInventor: Ivan Sheiham
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Patent number: 5753588Abstract: The present invention provides a heat sensitive recording material comprising a substrate and a recording layer thereon incorporating a colorless or light-colored basic dye and a color acceptor, the recording material being characterized in that, the basic dye comprises an indolyldiazaphthalide derivative of the formula (1), and the color acceptor comprises a diphenyl sulfone derivative of the formula (2) and/or a benzanilide derivative of the formula (3) ##STR1## wherein R.sub.1 to R.sub.8 are defined in the specification.Type: GrantFiled: July 25, 1996Date of Patent: May 19, 1998Assignee: New Oji Paper Company LimitedInventors: Takeshi Iida, Tatsuya Meguro, Tetsuo Tsuchida
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Patent number: 5750464Abstract: There is described a novel thermographic recording film, and more specifically, a novel image-forming system incorporated therein comprising at least one layer and including and a Lewis acid material, a di- or triarylmethane thiolactone dye precursor, an acidic organic material, a binder and a thermal stabilizer.Thermographic recording films comprising the novel image-forming system of the present invention exhibit excellent thermal stability, and desirable minimum optical densities, indicative of substantially less premature image development at elevated environmental temperatures.Embodiments of the invention wherein the thermographic recording films further include a light insensitive organic silver salt, a reducing agent, a binder and, preferably, a toning agent, show substantially enhanced image density.Type: GrantFiled: April 22, 1997Date of Patent: May 12, 1998Assignee: Polaroid CorporationInventors: Edward J. Dombrowski, Jr., Donna J. Guarrera, Robert L. Jones, Mark R. Mischke, John C. Warner, Jiyue Yang
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Patent number: 5750463Abstract: There is described a novel thermographic recording film, and more specifically, a novel image-forming system incorporated therein which employs both thiolactone and silver reduction chemistries.Thermographic recording films comprising the novel image-forming system of the present invention exhibit excellent thermal sensitivity and visual color saturation, enhanced image density, and desirable visual minimum optical densities.Type: GrantFiled: April 22, 1997Date of Patent: May 12, 1998Assignee: Polaroid CorporationInventors: Edward J. Dombrowski, Jr., Robert L. Jones, John C. Warner, Jiyue Yang
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Patent number: 5739078Abstract: By using the fluoran compound represented by the following general formula (I); ##STR1## wherein R.sup.1 is alkyl containing 1 to 4 carbon atoms, R.sup.3 is alkyl containing 1 to 8 carbon atoms, R.sup.4 is hydrogen or alkyl containing 1 to 8 carbon atoms, or R.sup.3 and R.sup.4 may bond with each other to form a ring together with a N atom, R.sup.2 is alkyl containing 1 to 4 carbon atoms, and n denotes 0, 1 or 2, however, the substituents represented by R.sup.2 may be different with each other when n is 2, as a color former for color forming recording materials, recording materials which have excellent properties in whiteness of the background of the material under light and in photostability of color-formed images on the materials as well as in sufficient color forming capability of the material even after having exposed them to light, can be provided.Type: GrantFiled: August 22, 1996Date of Patent: April 14, 1998Assignee: Nippon Soda Co., Ltd.Inventors: Mitsuhiro Yanagita, Takehiro Sato, Shigemi Suga, Tomoya Hidaka, Toru Kawabe, Mamoru Aizawa, Shinichi Sato, Izuo Aoki
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Patent number: 5691271Abstract: The present invention provides novel indolylazaphthalides represented by formula (I) described below. The indolylazaphthalides are useful as electron donative colorless dyes for preparing recording materials. Recording materials containing the novel indolylazaphthalides of formula (I) as electron donative colorless dyes provide images having blue to cyan colors at an excellent density, while suppressing light coloration in non-image areas. ##STR1## wherein R.sup.1 represents a divalent linkage group such as an alkylene group, cycloalkylene group, aralkylene group, or a phenylene group, which linkage group is linked to a bimolecular indolylazaphthalide compound to form a bis-type structure.Type: GrantFiled: May 16, 1996Date of Patent: November 25, 1997Assignee: Fuji Photo Film Co., Ltd.Inventors: Naoto Yanagihara, Kiyoshi Takeuchi, Toyohisa Oya, Naoki Asanuma, Masanobu Takashima, Syunsaku Higashi
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Patent number: 5670446Abstract: This invention includes novel sultine compounds and the reaction of these compounds to form colored compounds. The invention also includes the use of these color-forming compounds in the manufacture and imaging of thermal imaging papers and pressure-sensitive imaging papers.Type: GrantFiled: May 30, 1996Date of Patent: September 23, 1997Assignee: Minnesota Mining and Manufacturing CompanyInventors: Nusrallah Jubran, Alan R. Katritzky, Josef V. Ugro, Jr.
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Patent number: 5668080Abstract: A novel thermally-responsive record material is disclosed comprising a support having provided thereon in substantially contiguous relationship an election donating dye precursor and a compound of the formula ##STR1##Type: GrantFiled: December 3, 1996Date of Patent: September 16, 1997Assignee: Appleton Papers Inc.Inventors: Michael Gerald Cove, Mary Ellen Schulz
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Patent number: 5610118Abstract: A thermosensitive recording element having improved abrasion resistance, said element comprising (a) a support; (b) a first layer comprising an organic polymeric binder and either a substantially colorless electron donating dye precursor or an electron accepting compound or mixtures thereof; and (c) a second layer comprising an organic polymeric binder compatible with the binder in (b) and either a substantially colorless electron donating dye precursor or an electron accepting compound, wherein both dye precursor and electron accepting compound are present in the element and wherein the first layer is interposed between the support and second layer. These elements have wide application in the printing industry.Type: GrantFiled: December 29, 1994Date of Patent: March 11, 1997Assignee: International Paper CompanyInventor: Albert H. Smith
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Patent number: 5552365Abstract: Particularly advantageous and environmentally compatible recording material comprises, in microencapsulated form, at least one 3,1-benzoxazine color donor dissolved in a solvent, and is characterized in that the solvent consists of one or more natural oils and/or one or more esters of fatty acids on which natural oils are based, or comprises such oils and/or esters.Type: GrantFiled: March 10, 1995Date of Patent: September 3, 1996Assignee: Bayer AktiengesellschaftInventors: Horst Berneth, Gunter Klug, Jurgen Weisser
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Patent number: 5489566Abstract: There is described, in thermographic recording films, the use of a compound containing at least two epoxide moieties in the protective layer and/or in a layer on top of the protective layer of thermographic recording films to reduce gouging and streaking of the printed image film and to reduce head build-up on the thermal printhead.Type: GrantFiled: January 10, 1994Date of Patent: February 6, 1996Assignee: Polaroid CorporationInventors: Edward J. Dombrowski, John R. McPherson, Sr.
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Patent number: 5478793Abstract: A pressure sensitive recording material utilizing a color forming reaction between a colorless or light-colored basic dye and a color acceptor, and in which (1) a basic dye-containing layer and color acceptor-containing layer are formed on one surface of different substrates respectively, (2) a basic dye-containing layer and color acceptor-containing layer are formed on one surface and the other surface of a same substrate respectively, (3) a basic dye-containing layer and color acceptor-containing layer are superposed on one surface of a substrate or (4) a layer containing both basic dye and color acceptor is formed on one surface of a substrate, the pressure sensitive recording material being characterized in that the basic dye is at least one diarylmethane compound represented by the formula (1) given below, the basic dye being enclosed in synthetic high polymer microcapsules having a mean particle size of 3 to 15 .mu.m and an average film thickness of 0.1 to 0.7 .mu.Type: GrantFiled: September 9, 1993Date of Patent: December 26, 1995Assignee: Kanzaki Paper Manufacturing Co., Ltd.Inventors: Tetsuo Tsuchida, Yasuji Koga, Haruo Omura, Masato Tanaka, Nobuhisa Danou
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Patent number: 5468855Abstract: The invention relates to bislactone color formers having improved fastness to sublimation and migration stability, to their preparation, to pressure-sensitive and heat-sensitive recording materials containing said compounds and to their preparation. The novel bislactones have the formula (1) as defined in claim 1.Type: GrantFiled: August 31, 1994Date of Patent: November 21, 1995Assignee: Ciba-Geigy CorporationInventor: Rudolf Zink
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Patent number: 5451559Abstract: A thermosensitive recording element comprising a support having a Sheffield smoothness of less than 60, and at least one layer provided thereon wherein said layer comprises an organic polymeric binder, a substantially colorless electron donating dye precursor and an electron accepting compound capable of forming color by reacting with said dye precursor, wherein the binder, the electron accepting compound and the dye precursor have a particle size of less than about 3.mu..Type: GrantFiled: May 31, 1994Date of Patent: September 19, 1995Assignee: International Paper CompanyInventors: Albert H. Smith, Cortland R. Burt
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Patent number: 5418206Abstract: An abrasion resistant thermosensitive recording element having high gloss, and improved abrasion resistance and process of preparing said element are described. The element comprises (a) a support, (b) a first layer comprising an organic polymeric binder and a substantially colorless electron donating dye precursor, and (c) a second layer comprising an organic polymeric binder compatible with the binder in (b), an electron accepting compound capable of forming color by reaction with said dye precursor, and a crosslinking agent, wherein the first layer is interposed between the support and the second layer. These elements have wide application in the printing industry.Type: GrantFiled: October 22, 1991Date of Patent: May 23, 1995Assignee: International Paper CompanyInventor: Albert H. Smith
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Patent number: 5411929Abstract: There are disclosed thermally-processable image recording materials comprising a support carrying thereon; a di- or triarylmethane thiolactone dye, an organic silver salt, a binder; and a select group of substituted purine compounds for reducing a post-processed formation of a yellowish-brown color (gilding) within such materials.Type: GrantFiled: June 30, 1994Date of Patent: May 2, 1995Assignee: Polaroid CorporationInventors: Maureen F. Ford, Donna J. Guarrera, Mark R. Mischke, Ramdas P. Pai, John C. Warner
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Patent number: 5401699Abstract: The heat-sensitive recording material has on a base sheet a heat-sensitive recording layer which comprises a colorless or pale colored basic chromogenic material and a color developer. The recording layer comprises at least one fluoran derivative developing a black color and at least one azaphthalide derivative represented by the formula (I) as the basic chromogenic material, and at least one diphenylsulfone derivative represented by the formula (II) as the color developer. The azaphthalide derivative is used in an amount of 3 to 50 % by weight based on the amount of the fluoran derivative.Type: GrantFiled: August 24, 1993Date of Patent: March 28, 1995Assignee: Kanzaki Paper Manufacturing Co., Ltd.Inventors: Masanori Ohashi, Tetsuo Tsuchida, Kiyomi Okada
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Patent number: 5324704Abstract: Disclosed are novel fluoran compounds represented by the formula (I): ##STR1## wherein R.sub.1 and R.sub.2 are different groups selected from cyclohexyl, n-butyl and isobutyl, e.g., in the form of crystals characterized by a specific X-ray diffraction diagram; crystalline toluene adducts thereof; and recording materials containing these fluoran compounds.Type: GrantFiled: March 29, 1993Date of Patent: June 28, 1994Assignee: Mitsui Toatsu Chemicals, Inc.Inventors: Masakatsu Nakatsuka, Atsuo Otsuji, Kiyoharu Hasegawa, Masatoshi Takagi, Akihiro Yamaguchi
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Patent number: 5286702Abstract: The present invention provides a novel phthalide compound represented by the following formula, which rapidly forms blue-blue black color with a developer when it is used as a recording material and, since a color image formed therewith has an intense absorption at 700.about.50 nm, it is usable for optical character reader; ##STR1## where R.sup.1 and R.sup.2 represent, independently, alkyl group having 6 or less carbon atoms; cycloalkyl group having 5 or 6 carbon atoms; aryl group; or heterocyclic ring connecting R.sup.1, R.sup.2 and N, R.sup.3 and R.sup.4 represent, independently, alkyl group having 6 or less carbon atoms; cycloalkyl group having 5 or 6 carbon atoms; aryl group; a heterocyclic ring connecting R.sup.3, R.sup.4 and N, X.sup.1 .about.X.sup.3 represent, independently, hydrogen atom, alkyl group having 6 or less carbon atoms, alkoxy group having 6 or less carbon atom or halogen atom, X.sup.Type: GrantFiled: April 24, 1992Date of Patent: February 15, 1994Assignee: Yamada Chemical Co., Ltd.Inventors: Yutaka Muraki, Hidekazu Ishida, Hajime Kawai, Katsuhiko Tsunemitsu
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Patent number: 5278127Abstract: This invention relates to the use of a compound containing at least two epoxide moieties in the protective topcoat layer and/or in a layer on top of the protective topcoat layer of certain thermographic recording films to reduce gouging and streaking of the printed image film and to reduce head build-up on the thermal printhead.Type: GrantFiled: January 27, 1993Date of Patent: January 11, 1994Assignee: Polaroid CorporationInventors: Edward J. Dombrowski, John R. McPherson, Sr.
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Patent number: 5250493Abstract: A thermosensitive recording material having a support and a thermosensitive coloring layer formed on the support, which thermosensitive coloring layer includes at least a first thermosensitive coloring layer containing at least one leuco dye having formula (I), (II) or (III) and a color developer capable of inducing color formation in the leuco dye under application of heat thereto, and a second thermosensitive coloring layer containing at least one leuco dye having formula (IV) and a color developer capable of inducing color formation in the leuco dye under application of heat thereto. The leuco dye for use in the first thermosensitive coloring layer has the absorption intensity in the near infrared region, and the leuco dye for use in the second thermosensitive coloring layer has the absorption intensity in the visible spectrum.Type: GrantFiled: November 22, 1991Date of Patent: October 5, 1993Assignee: Ricoh Company, Ltd.Inventors: Takashi Ueda, Yasuhiko Watanabe