Identified Sensitizer Containing Patents (Class 430/340)
  • Patent number: 9522967
    Abstract: A photopolymerization accelerator composition improving color stability and controlling polymerization shrinkage stress of cured resin and/or the resulting composite paste thereby feature by tertiary twisted biphenyldiamine with the general formula I: R2 and R3 are each independently alkyl having from 1 to 5 carbon atoms; R and R1 are each independently hydrogen or halogen; alkyl alkoxy, or alkylthio having from 1 to 18 carbon atoms; or phenyl and/or substituted phenyl alkoxy, or alkylthio having from 1 to 18 carbon atoms. It can be used in part with conventional photosensitizers and radically polymerizable monomers.
    Type: Grant
    Filed: June 8, 2007
    Date of Patent: December 20, 2016
    Assignee: DENTSPLY International Inc.
    Inventors: Xiaoming Jin, Paul D. Hammesfahr
  • Patent number: 9387450
    Abstract: A method for producing bacteriorhodopsin-containing microcapsules is described, which can be optically activated, having a diameter of less than 50 ?m, preferably less than 10 ?m, comprising an enveloping layer, which protects the bacteriorhodopsin from harmful environmental factors, while at the same time preserving the functionality thereof. In doing so, bacteriorhodopsin is suspended in a first step, in the form of PM/BR patches in an aqueous medium having a pH value ranging from 6-9 in the presence of a water-retaining polymer, and said suspension is spray-dried to form a powder, or is dried in an aliphatic solvent using low steam pressure and subsequent dehydration to form a powder. In a second step, the powder obtained in this way is provided with an envelope, which is substantially completely translucent to light in the visible range and made of a polymer and/or a paraffin having a solidification point ranging between 45° C. and 65° C. and/or a carnauba wax having a melting range of 70-90° C.
    Type: Grant
    Filed: March 22, 2010
    Date of Patent: July 12, 2016
    Assignee: U-NICA Technology AG
    Inventors: Ulrich Ritter, Markus Lange, Samuel Schindler
  • Patent number: 8586279
    Abstract: The present invention provides dual wavelength imaging compositions, processes for forming dual wavelength imaging compositions, methods for forming images using dual wavelength imaging compositions and substrate (e.g., paper web) treated (e.g., coated) on one or both sides with dual wavelength imaging compositions. Also provided is a dual wavelength imaging particulate comprising a matrix of polymer material and containing: one or more image-forming agents; a photo-oxidizing agent which is activated at a first wavelength of light to cause the one or more image-forming agents to form one or more images; and a reducing agent which is activated at a second wavelength of light to cause termination of the formation of the one or more images.
    Type: Grant
    Filed: April 13, 2011
    Date of Patent: November 19, 2013
    Assignee: International Paper Company
    Inventors: Richard C. Williams, Richard D. Faber, Oleg Grinevich, John Malpert, Alexandre Mejiritski, Douglas C. Neckers
  • Patent number: 8586280
    Abstract: The present invention provides dual energy imaging compositions, processes for forming dual energy imaging compositions, methods for forming images using dual energy imaging compositions and substrate (e.g., paper web) treated (e.g., coated) on one or both sides with a dual energy imaging composition. Also provided is a particulate comprising a matrix of polymer material and containing one or more image-forming agents and a photo-oxidizing agent useful in making dual energy imaging compositions.
    Type: Grant
    Filed: April 13, 2011
    Date of Patent: November 19, 2013
    Assignee: International Paper Company
    Inventors: Richard C. Williams, Richard D. Faber, Oleg Grinevich, John Malpert, Alexandre Mejiritski, Douglas C. Neckers
  • Patent number: 8475975
    Abstract: In accordance with one aspect of the present invention, a method for recording holographic data in an optical data storage medium is provided. The method includes (i) providing an optical data storage medium including: (a) a thermoplastic polymer matrix, (b) a latent acid generator, (c) a non-linear sensitizer, and (d) a reactant including a latent chromophore. The method further includes (ii) irradiating a volume element of the optical data storage medium with an interference pattern, said interference pattern including an incident radiation having a wavelength and an intensity sufficient to cause upper triplet energy transfer from the non-linear sensitizer to the latent acid generator, thereby generating an acid, wherein the latent acid generator is substantially non-responsive to said incident radiation.
    Type: Grant
    Filed: June 21, 2011
    Date of Patent: July 2, 2013
    Assignee: General Electric Company
    Inventors: Arunkumar Natarajan, Eugene Pauling Boden, Dmitry Vladimirovich Dylov, James Edward Pickett, Evgenia Mikhailovna Kim, Patrick Joseph McCloskey, Kwok Pong Chan, Victor Petrovich Ostroverkhov, Matthew Jeremiah Misner, Vijay Krishna Paruchuru
  • Patent number: 8048606
    Abstract: An imaging method is disclosed. An imaging composition is coated on a work piece followed by applying a sufficient amount of energy from a 3-D imaging system to form an image on the coated work piece. The image may be a logo or marker for alignment of parts.
    Type: Grant
    Filed: March 17, 2006
    Date of Patent: November 1, 2011
    Assignee: Rohm and Haas Electronic Materials LLC
    Inventors: Robert K. Barr, James T. Fahey, Corey O'Connor, James G. Shelnut
  • Patent number: 7754413
    Abstract: A radiation image-able coating includes a first phase including a radiation curable polymer matrix and an activator disposed in the radiation curable polymer matrix, a second phase insolubly distributed in the first phase, the second phase including a color-former, and a sensitizing agent distributed in at least one of the first and second phase, wherein the first phase includes a radiation curable polymer matrix containing at least one high glass transition temperature (Tg) monofunctional monomer or oligomer having a Tg greater than approximately 60° C.
    Type: Grant
    Filed: March 10, 2006
    Date of Patent: July 13, 2010
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: Vladek Kasperchik, Molly L. Hladik
  • Patent number: 7498123
    Abstract: Disclosed are novel aminium, diimonium, and polymethine borate dyes that have at least one absorption maximum in the infrared spectral region between about 700 and 2000 nm and that are useful as infrared absorbers, the anionic borate moiety having the formula: [BXaYb]?, in which a and b are integers with a ranging from 0 to 3 and b ranging from 1 to 4 and a+b=4; X, which may be identical or different, are each a halogen atom, an OH functional group, or a C1 to C20 alkyl or alicyclic radical, and Y, which may be identical or different, are each a phenyl radical, at least one Y substituted by at least one element or electron-withdrawing substituent such as a perfluoroalkyl group, or by one or more halogen atoms, or an aryl radical containing at least two aromatic ring members, which may also be further substituted. Such dyes may be incorporated into films or bulk materials to form light filters for electromagnetic radiation, including laser radiation.
    Type: Grant
    Filed: March 3, 2005
    Date of Patent: March 3, 2009
    Assignee: Exciton, Inc.
    Inventor: Paul A. Cahill
  • Patent number: 7270944
    Abstract: A composition, method, and system for recording an image. The system includes a multiphase imaging material in which energy is absorbed by an antenna material. The absorbed energy causes the reaction of an oxidizer and a leucozine dye.
    Type: Grant
    Filed: March 29, 2005
    Date of Patent: September 18, 2007
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventor: Makarand P. Gore
  • Patent number: 7270932
    Abstract: Imaging compositions and methods of using the compositions are disclosed. The imaging compositions are sensitive to low levels of energy such that upon application of the low levels of energy the compositions change color or shade. The compositions may be used in methods of marking.
    Type: Grant
    Filed: February 6, 2004
    Date of Patent: September 18, 2007
    Assignee: Rohm and Haas Electronic Materials LLC
    Inventors: Robert K. Barr, James T. Fahey, Corey O'Connor, James G. Shelnut, John J. Piskorski
  • Patent number: 7223519
    Abstract: Imaging compositions and methods of using the compositions are disclosed. The imaging compositions are sensitive to low levels of energy such that upon application of the low levels of energy the compositions change color or shade. The compositions may be applied to a work piece to mark it and removed from the work piece by peeling.
    Type: Grant
    Filed: July 13, 2005
    Date of Patent: May 29, 2007
    Assignee: Rohm and Haas Electronic Materials LLC
    Inventors: Robert K. Barr, Corey O'Connor
  • Patent number: 7169542
    Abstract: A composition, method, and system for recording an image. The system includes a multiphase imaging material in which energy is absorbed by an antenna material. The absorbed energy causes the reaction of an activator and a color-forming material.
    Type: Grant
    Filed: April 30, 2004
    Date of Patent: January 30, 2007
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: Vladek Kasperchik, Makarand Gore
  • Patent number: 7144676
    Abstract: Imaging compositions and methods of using the compositions are disclosed. The imaging compositions are sensitive to low levels of energy such that upon application of the low levels of energy the compositions change color or shade. The compositions may be applied to a work piece to mark it and removed from the work piece by peeling.
    Type: Grant
    Filed: July 12, 2004
    Date of Patent: December 5, 2006
    Assignee: Rohm and Haas Electronic Materials LLC
    Inventors: Robert K. Barr, Corey O'Connor
  • Patent number: 7141360
    Abstract: Imaging layers, image recording media, and methods of preparation of each, are provided. One exemplary embodiment of the imaging layer, among others, includes a matrix, a radiation absorbing compound dissolved in the matrix, at least two activators substantially dissolved in the matrix, and a color former. The activators can include a primary activator having a higher acidity than a secondary activator. In addition, the primary activator has a lower solubility in the matrix than the secondary activator. The color former is substantially insoluble in the matrix at ambient conditions and is substantially uniformly distributed in the matrix.
    Type: Grant
    Filed: June 9, 2004
    Date of Patent: November 28, 2006
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: Vladek Kasperchik, Jayprakash C. Bhatt, Cari L Dorsh
  • Patent number: 7083904
    Abstract: A composition, method, and system for recording an image. The system includes an imaging material in which radiation energy is absorbed by an antenna material. The antenna material may be chosen from the group consisting of phthalocyanines and naphthalocyanines.
    Type: Grant
    Filed: September 5, 2003
    Date of Patent: August 1, 2006
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventor: Makarand P. Gore
  • Patent number: 7026103
    Abstract: A multilayer imageable article with at least two layers including a multiphoton imageable composition. The composition includes a multiphoton-sensitive photoactive system and at least one of a dye and a dye precursor. The photoactive system includes a multiphoton sensitizer capable of simultaneously absorbing at least two photons, an electron acceptor capable of transformation to a dye-activating species upon interaction with the multiphoton sensitizer subsequent to absorption of at least two photons, and optionally an electron donor.
    Type: Grant
    Filed: June 14, 2001
    Date of Patent: April 11, 2006
    Assignee: 3M Innovative Properties Company
    Inventors: Robert J. DeVoe, Robert D. DeMaster, Brook F. Duerr, Jonathan P. Kitchin, Dennis E. Vogel
  • Patent number: 6974661
    Abstract: A composition, method, and system for recording an image. The system includes a multiphase imaging material in which energy is absorbed by an antenna material. The absorbed energy causes the reaction of an activator and a color-forming material.
    Type: Grant
    Filed: January 24, 2003
    Date of Patent: December 13, 2005
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: Makarand P. Gore, Marshall Field, Vladek P Kasperchik
  • Patent number: 6815679
    Abstract: A reversible thermal recording material permits recording having a clear contrast at a high sensitivity and erasing such images a number of times, at least 1,000 times, repetitively, and comprises a leuco dye, a reversible developer and a light-heat-converting dye, the light-heat-converting dye having a deterioration ratio of 20% or less when a laser beam having an oscillation wavelength of 830 nm is applied thereto repeatedly 1000 times at a temperature of 25° C. at an energy of 2 J/cm2 or being a phthalocyanine compound having a vanadyl group, and a method of recording an image comprises applying a laser beam to the reversible thermal recording material, wherein the colored leuco dye is achromatized with energy that is 25 to 65% of the energy of the laser beam employed for causing the leuco dye to develop a color.
    Type: Grant
    Filed: February 11, 2003
    Date of Patent: November 9, 2004
    Assignee: Mitsubishi Paper Mills Limited
    Inventor: Yoichiro Azuma
  • Publication number: 20040146812
    Abstract: A composition, method, and system for recording an image. The system includes a multiphase imaging material in which energy is absorbed by an antenna material. The absorbed energy causes the reaction of an activator and a color-forming material.
    Type: Application
    Filed: January 24, 2003
    Publication date: July 29, 2004
    Inventors: Makarand P. Gore, Marshall Field, Vladek P. Kasperchik
  • Publication number: 20030194651
    Abstract: A multilayer imageable article with at least two layers including a multiphoton imgeable composition. The composition includes a multiphoton-sensitive photoactive system and at least one of a dye and a dye precursor. The photoactive system includes a multiphoton sensitizer capable of simultaneously absorbing at least two photons, an electron acceptor capable of transformation to a dye-activating species upon interaction with the multiphoton sensitizer subsequent to absorption of at least two photons, and optionally an electron donor.
    Type: Application
    Filed: December 12, 2002
    Publication date: October 16, 2003
    Inventors: Robert J. De Voe, Robert D. DeMaster, Brook F. Duerr, Jonathan P. Kitchin, Dennis E. Vogel
  • Patent number: 6607871
    Abstract: An image recording medium comprising a light and heat change material capable of recording an image with laser beam is described, characterized in that therein are incorporated a heat generator having no absorption at a wavelength of 500 nm or more which undergoes exothermic decomposition to amplify heat generation when acted upon by heat and a compound which undergoes thermochemical reaction to show an absorption change at a wavelength of from 360 nm to 900 nm.
    Type: Grant
    Filed: September 21, 2000
    Date of Patent: August 19, 2003
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Tatsuhiko Obayashi, Atsuhiro Ookawa
  • Patent number: 6398981
    Abstract: The present invention is concerned with photopolymer materials sensitive to infrared, near infrared, red and green light radiation for initiating polymerization and to applications of such photopolymer, like holographic polymer dispersed liquid crystal (H-PDLC) or reversible dye doped photopolymer (RDDP) materials, for making optical devices. The invention relates to holographic polymer dispersed liquid crystal and reversible dye materials having improved electrical and optical switching properties.
    Type: Grant
    Filed: February 14, 2000
    Date of Patent: June 4, 2002
    Assignee: Universite Laval
    Inventors: Tigran Galstian, Amir Tork
  • Patent number: 6342329
    Abstract: An image-forming medium comprises a substrate and several types of photo-curing compositions with sensitivity peaks in different wavelength regions supported thereon. Each of the several types of photocuring compositions contains a spectral sensitizer which is designed so that there is apparently no crosstalk in an image which is formed using the image-forming medium.
    Type: Grant
    Filed: January 12, 1999
    Date of Patent: January 29, 2002
    Assignee: Brother Kogyo Kabushiki Kaisha
    Inventor: Masashi Tsuda
  • Patent number: 6262181
    Abstract: This invention relates to a process for generating a organically soluble partially cross-linked acid labile polymer according to the present invention comprises the steps of providing a polymer with one or more monomer units, wherein at least one of the monomer units contain one or more pendant COOH or hydroxyl groups; and reacting said polymer with a polyvinyl ether in the presence of a acid catalyst to form links between at least two polymer chains. The resulting polymer can be used as a component in a photoresist formulation.
    Type: Grant
    Filed: December 22, 1999
    Date of Patent: July 17, 2001
    Assignee: Arch Specialty Chemicals, Inc.
    Inventors: Nageshwer Rao Bantu, Donald Frank Perry, Jacqueline Marie Marshall, Timothy Michael Holt
  • Patent number: 6251571
    Abstract: Novel thermally imageable monochrome product compositions, elements, and processes are disclosed herein. These compositions and elements characteristically have high contrast and fast imaging speeds. The thermally imageable compositions of this invention contain at least one polymeric binder, a specified leuco dye and a specified hydroxylamine compound. These compositions have the propensity for affording, upon thermal imaging, highly colored images having high optical density values. At the same time, background color is low in preferred compositions even after extensive exposure to ambient light. These compositions can be imagewise heated to effect color formation (i.e., generation of an image) or, in case of compositions containing at least one near IR-absorbing dye, can be imagewise exposed to near IR radiation from a laser or other device to effect color formation (i.e., generation of an image).
    Type: Grant
    Filed: March 10, 1998
    Date of Patent: June 26, 2001
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: Rolf Dessauer, Jonathan V Caspar
  • Patent number: 6242154
    Abstract: A process for generation of acid uses a medium comprising a first acid-generating component capable of generating a first acid, and a secondary acid generator, this secondary acid generator being capable of thermal decomposition to form a secondary acid, the thermal decomposition of the secondary acid generator being catalyzed by the first acid. At least part of the medium is exposed to so as to cause formation of the first acid from the first acid-generating component; and the medium is then heated to cause, in the exposed part of the medium, acid-catalyzed thermal decomposition of the secondary acid generator and formation of the secondary acid.
    Type: Grant
    Filed: December 11, 1998
    Date of Patent: June 5, 2001
    Assignee: Polaroid Corporation
    Inventors: Jurgen M. Grasshoff, John L. Marshall, Richard A. Minns, Socorro M. Ramos, Stephen G. Stroud, Stephen J. Telfer, Haixin Yang, Roger A. Boggs, Eric S. Kolb
  • Patent number: 6235095
    Abstract: An improved ink suitable for ink jet printing comprising, a mixture of a colorant, an arylketoalkene stabilizing compound or a photoreactor, and a liquid vehicle, wherein the colorant is light-stable. When the photoreactor is combined with a wavelength-selective sensitizer to form a radiation transorber, the colorant is mutable upon exposure of the radiation transorber to specific, narrow bandwidth radiation. The colored composition may also contain a molecular includant having a chemical structure which defines at least one cavity wherein each of the colorant and photoreactor or radiation transorber is associated with the molecular includant. The invention also includes ink jet print cartridges containing the improved ink, ink jet printers containing the improved ink and methods of printing using the improved ink.
    Type: Grant
    Filed: June 1, 1999
    Date of Patent: May 22, 2001
    Inventors: Ronald Sinclair Nohr, John Gavin MacDonald
  • Patent number: 6110638
    Abstract: A process for generation of acid uses a medium comprising a first acid-generating component capable of generating a first acid, and a secondary acid generator, this secondary acid generator being capable of thermal decomposition to form a secondary acid, the thermal decomposition of the secondary acid generator being catalyzed by the first acid. At least part of the medium is exposed to so as to cause formation of the first acid from the first acid-generating component; and the medium is then heated to cause, in the exposed part of the medium, acid-catalyzed thermal decomposition of the secondary acid generator and formation of the secondary acid.
    Type: Grant
    Filed: November 27, 1996
    Date of Patent: August 29, 2000
    Assignee: Polaroid Corporation
    Inventors: Roger A. Boggs, Jurgen M. Grasshoff, Eric S. Kolb, John L. Marshall, Richard A. Minns, Socorro M. Ramos, Stephen G. Stroud, Stephen J. Telfer, Haixin Yang
  • Patent number: 6063551
    Abstract: One embodiment of the present invention is a method and composition comprising a novel pre-dye molecule that is colorless and stable to ordinary light. The pre-dye molecule is capable of forming a color when exposed to certain wavelengths of electromagnetic radiation. A second embodiment of the present invention is a method of converting a conventional leuco dye to a colored composition by exposing the leuco dye admixed with a radiation transorber to certain wavelengths of electromagnetic radiation.
    Type: Grant
    Filed: November 16, 1998
    Date of Patent: May 16, 2000
    Assignee: Kimberly-Clark Worldwide, Inc.
    Inventors: Ronald Sinclair Nohr, John Gavin MacDonald
  • Patent number: 6015621
    Abstract: An ultraviolet-sensitive dosimeter material comprises at least one diazonium compound featuring absorption in the ultraviolet wavelength range, and a binder. The diazonium compound is preferably formed by a diazonium salt of the general formula ##STR1## in which R.sub.1, R.sub.2, R.sub.3 and X.sup.- are selected from the following groups:R.sub.1 : H, halogen, alkyl with C.sub.1 -C.sub.5, alkoxy with C.sub.1 -C.sub.5, aryloxy,R.sub.2 : H, halogen, alkyl with C.sub.1 -C.sub.5, alkoxy with C.sub.1 -C.sub.5, aryloxy,NR'R" (R', R" same or differing alkyl compounds or heterocyclic armines, or COOR.sub.4 (R.sub.4 alkyl with C.sub.1 -C.sub.5), andR.sub.3 : H, alkoxy with C.sub.1 -C.sub.5, andX.sup.- : diazo process anions, or perfluorinated aliphatic or aromatic anions.
    Type: Grant
    Filed: April 28, 1998
    Date of Patent: January 18, 2000
    Assignee: Syntec Gesellschaft fur Chemie und Technologie der Informationsaufzeichnu ng mbH
    Inventors: Regina Lischewski, Ursula Sell, Jorg Marx, Uwe Gohs
  • Patent number: 6004486
    Abstract: The invention concerns photochromic compounds with the following Formula: ##STR1## in which: R.sup.1 is a asymmetric aliphatic monocyclic group with the Formula, ##STR2## where l=1-12, and R.sup.9 is H or an alkyl, alkoxy, dialkylamino, alkyl ester or CN group with the condition that at least one of the R.sup.9 groups is not H,R.sup.2 -R.sup.7 can have a variety of meanings, A represents a (hetero)aromatic ring which can be substituted and n is a whole number.Application to the production of photochromic articles made of organic polymer, notably lenses.
    Type: Grant
    Filed: February 2, 1998
    Date of Patent: December 21, 1999
    Assignee: Corning Incorporated
    Inventor: You-Ping Chan
  • Patent number: 6004719
    Abstract: A process for producing an image uses an imaging medium comprising an acid-generating layer or phase comprising a mixture of a superacid precursor, a sensitizing dye and a secondary acid generator, and a color-change layer comprising an image dye. The sensitizing dye has first and second forms, the first form having substantially greater substantial absorption in a first wavelength range than the second form. The superacid precursor is not capable, in the absence of the first form of the sensitizing dye, of being decomposed by radiation in the first wavelength range. The secondary acid generator is capable of thermal decomposition, catalyzed by superacid, to form a secondary acid. While at least part of the sensitizing dye is in its first form, the medium is imagewise exposed to radiation in the first wavelength range, thereby causing, in the exposed areas of the acid-generating layer, the formation of superacid.
    Type: Grant
    Filed: May 19, 1997
    Date of Patent: December 21, 1999
    Assignee: Polaroid Corporation
    Inventors: Russell A. Gaudiana, Robert W. Haddock, Serajul Haque, Iris B. Kliman Bloom, John L. Marshall, Socorro M. Ramos, Larry C. Takiff, Stephen J. Telfer, Michael A. Young
  • Patent number: 5919608
    Abstract: The sensitivity to radiation of combinations of cationic electron acceptors (such as phosphonium, sulfonium, diazonium and iodonium salts) with sensitizing dyes, which sensitize these cationic electron acceptors to wavelengths (typically visible wavelengths) to which they are not sensitive in the absence of the dye, can be increased by including with the cationic electron acceptor and the sensitizing dye a supersensitizer which has an oxidation potential lower than that of the sensitizing dye, the supersensitizer being an ionic compound having a cation comprising an ionic grouping, said grouping comprising at least one atom of an element from Group VB, VIB or VIIB of the Periodic Table.
    Type: Grant
    Filed: October 29, 1997
    Date of Patent: July 6, 1999
    Assignee: Polaroid Corporation
    Inventors: Serajul Haque, John L. Marshall, Stephen J. Telfer
  • Patent number: 5914213
    Abstract: A process for generation of acid uses a medium comprising a first acid-generating component capable of generating a first acid, and a secondary acid generator, this secondary acid generator being capable of thermal decomposition to form a secondary acid, the thermal decomposition of the secondary acid generator being catalyzed by the first acid. At least part of the medium is exposed to so as to cause formation of the first acid from the first acid-generating component; and the medium is then heated to cause, in the exposed part of the medium, acid-catalyzed thermal decomposition of the secondary acid generator and formation of the secondary acid.
    Type: Grant
    Filed: October 6, 1997
    Date of Patent: June 22, 1999
    Assignee: Polaroid Corporation
    Inventors: Jurgen M. Grasshoff, John L. Marshall, Richard A. Minns, Socorro M. Ramos, Stephen G. Stroud, Stephen J. Telfer, Haixin Yang, Roger A. Boggs, Eric S. Kolb
  • Patent number: 5908495
    Abstract: An improved ink suitable for ink jet printing comprising, a mixture of a colorant, an arylketoalkene stabilizing compound or a photoreactor, and a liquid vehicle, wherein the colorant is light-stable. When the photoreactor is combined with a wavelength-selective sensitizer to form a radiation transorber, the colorant is mutable upon exposure of the radiation transorber to specific, narrow bandwidth radiation. The colored composition may also contain a molecular includant having a chemical structure which defines at least one cavity wherein each of the colorant and photoreactor or radiation transorber is associated with the molecular includant. The invention also includes ink jet print cartridges containing the improved ink, ink jet printers containing the improved ink and methods of printing using the improved ink.
    Type: Grant
    Filed: September 24, 1997
    Date of Patent: June 1, 1999
    Inventors: Ronald Sinclair Nohr, John Gavin MacDonald
  • Patent number: 5905148
    Abstract: Polysiloxane copolymers containing both photochromic and lightstabilizing groups with enhanced UV-fatigue resistance can be used as coatings for devices with variable optical density, including lenses, glazing, textiles and the like, to provide light-sensitive darkening effects. The photochromic groups are spironaphtooxazine groups and the lightstabilizing groups are hindered amine light stabilizing (HALS) groups.
    Type: Grant
    Filed: August 6, 1997
    Date of Patent: May 18, 1999
    Assignee: Yeda Research and Development Co. Ltd.
    Inventors: Valeri Krongauz, Alexander Zelichonok, Frida Buchholz, Judith Ratner
  • Patent number: 5883232
    Abstract: Disclosed are diazahemicyanine hydrophobic cationic dyes represented by the formula (1): ##STR1## wherein R.sup.1, R.sup.2, R.sup.3 and R.sup.4 are lower alkyl groups having not more than 5 carbon atoms, R.sup.5 is a lower alkyl group having not more than 5 carbon atoms or a lower alkoxy lower alkyl group having not more than 6 carbon atoms, and Z.sup.- is a counter ion having a hydrophobic organic group, and a thermal transfer ink ribbon having a substrate and and ink layer laminated thereon containing said cationic dye.
    Type: Grant
    Filed: July 14, 1998
    Date of Patent: March 16, 1999
    Assignees: Sony Corporation, Hodog aya Chemical Co., Ltd.
    Inventors: Masanobu Hida, Kengo Ito, Yoshio Fujiwara, Nobuo Suzuki, Hiroyoshi Yamaga, Junichi Hagiwara
  • Patent number: 5837429
    Abstract: One embodiment of the present invention is a method and composition comprising a novel pre-dye molecule that is colorless and stable to ordinary light. The pre-dye molecule is capable of forming a color when exposed to certain wavelengths of electromagnetic radiation. A second embodiment of the present invention is a method of converting a conventional leuco dye to a colored composition by exposing the leuco dye admixed with a radiation transorber to certain wavelengths of electromagnetic radiation.
    Type: Grant
    Filed: June 5, 1996
    Date of Patent: November 17, 1998
    Assignee: Kimberly-Clark Worldwide
    Inventors: Ronald Sinclair Nohr, John Gavin MacDonald
  • Patent number: 5786132
    Abstract: One embodiment of the present invention is a method and composition comprising a novel pre-dye molecule that is colorless and stable to ordinary light. The pre-dye molecule is capable of forming a color when exposed to certain wavelengths of electromagnetic radiation. A second embodiment of the present invention is a method of converting a conventional leuco dye to a colored composition by exposing the leuco dye admixed with a radiation transorber to certain wavelengths of electromagnetic radiation.
    Type: Grant
    Filed: May 29, 1996
    Date of Patent: July 28, 1998
    Assignee: Kimberly-Clark Corporation
    Inventors: Ronald Sinclair Nohr, John Gavin MacDonald
  • Patent number: 5700850
    Abstract: A light-stable colored composition which includes a colorant and a radiation transorber. The colorant, in the presence of the radiation transorber, is adapted, upon exposure of the transorber to specific, narrow bandwidth radiation, to be mutable. The radiation transorber also imparts light-stability to the colorant so that the colorant does not fade when exposed to sunlight or artificial light.
    Type: Grant
    Filed: June 5, 1995
    Date of Patent: December 23, 1997
    Assignee: Kimberly-Clark Worldwide
    Inventors: Ronald Sinclair Nohr, John Gavin MacDonald
  • Patent number: 5681380
    Abstract: An improved ink suitable for ink jet printing comprising, a mixture of a colorant, an arylketoalkene stabilizing compound or a photoreactor, and a liquid vehicle, wherein the colorant is light-stable. When the photoreactor is combined with a wavelength-selective sensitizer to form a radiation transorber, the colorant is mutable upon exposure of the radiation transorber to specific, narrow bandwidth radiation. The colored composition may also contain a molecular includant having a chemical structure which defines at least one cavity wherein each of the colorant and photoreactor or radiation transorber is associated with the molecular includant. The invention also includes ink jet print cartridges containing the improved ink, ink jet printers containing the improved ink and methods of printing using the improved ink.
    Type: Grant
    Filed: December 19, 1996
    Date of Patent: October 28, 1997
    Assignee: Kimberly-Clark Worldwide, Inc.
    Inventors: Ronald Sinclair Nohr, John Gavin MacDonald
  • Patent number: 5667943
    Abstract: Certain squaric acid derivatives are useful for the thermochemical generation of acid. The squaric acid derivatives may be used in imaging media in conjunction with acid-sensitive materials which undergo a color change when contacted by the acid generated from the squaric acid derivatives. Preferably, the acid-sensitive materials undergo an irreversible color change, so that the image can be fixed by neutralizing all the acid generated with excess base, thereby preventing further color change in the image during long term storage.
    Type: Grant
    Filed: April 8, 1996
    Date of Patent: September 16, 1997
    Assignee: Polaroid Corporation
    Inventors: Roger A. Boggs, Jurgen M. Grasshoff, Mark R. Mischke, Anthony J. Puttick, Stephen J. Telfer, David P. Waller, Kenneth C. Waterman
  • Patent number: 5645964
    Abstract: A digital information recording media which includes a recording layer comprising a light-stable colored composition which composition is mutable or decolorizable upon exposure to a specific wavelength of ultraviolet radiation. The light-stable colored composition includes a colorant and an ultraviolet radiation transorber. The colorant, in the presence of the radiation transorber, is adapted, upon exposure of the transorber to specific, narrow bandwidth ultraviolet radiation, to be mutable. The radiation transorber also imparts light-stability to the colorant so that the colorant does not fade when exposed to sunlight or artificial light. The ultraviolet radiation transorber is adapted to absorb radiation and interact with the colorant to effect the irreversible mutation of the colorant. Especially useful radiation is incoherent, pulsed ultraviolet radiation produced by a dielectric barrier discharge excimer lamp or coherent, pulse radiation produced by an excimer laser.
    Type: Grant
    Filed: June 5, 1995
    Date of Patent: July 8, 1997
    Assignee: Kimberly-Clark Corporation
    Inventors: Ronald Sinclair Nohr, John Gavin MacDonald
  • Patent number: 5643356
    Abstract: An improved ink suitable for ink jet printing comprising, a mixture of a colorant, an arylketoalkene stabilizing compound or a photoreactor, and a liquid vehicle, wherein the colorant is light-stable. When the photoreactor is combined with a wavelength-selective sensitizer to form a radiation transorber, the colorant is mutable upon exposure of the radiation transorber to specific, narrow bandwidth radiation. The colored composition may also contain a molecular includant having a chemical structure which defines at least one cavity wherein each of the colorant and photoreactor or radiation transorber is associated with the molecular includant. The invention also includes ink jet print cartridges containing the improved ink, ink jet printers containing the improved ink and methods of printing using the improved ink.
    Type: Grant
    Filed: June 5, 1995
    Date of Patent: July 1, 1997
    Assignee: Kimberly-Clark Corporation
    Inventors: Ronald Sinclair Nohr, John Gavin MacDonald
  • Patent number: 5631118
    Abstract: A process for producing an image uses an imaging medium comprising an acid-generating layer or phase comprising a mixture of a superacid precursor, a sensitizing dye and a secondary acid generator, and a color-change layer comprising an image dye. The sensitizing dye has first and second forms, the first form having substantially greater substantial absorption in a first wavelength range than the second form. The superacid precursor is capable of being decomposed to produce superacid by radiation in a second wavelength range, but is not, in the absence of the sensitizing dye, capable of being decomposed by radiation in the first wavelength range. The secondary acid generator is capable of acid-catalyzed thermal decomposition by unbuffered superacid to form a secondary acid.
    Type: Grant
    Filed: April 28, 1995
    Date of Patent: May 20, 1997
    Assignee: Polaroid Corporation
    Inventors: Russell A. Gaudiana, Robert W. Haddock, John L. Marshall, Larry C. Takiff, Stephen J. Telfer, Michael A. Young
  • Patent number: 5614340
    Abstract: A bleachable composition, including an acid photogenerator and a near-infrared radiation-absorbing dye or pigment, is utilized in a method of migration imaging to prevent unwanted absorptions. This composition can be incorporated either in the thermoplastic imaging surface layer of the imaging element, in the marking particles applied to the element, or both. Alternatively, the components of the bleachable composition can be separated with one in the thermoplastic imaging surface layer and the other in the marking particles. After the imaging element is marked and exposed with near-infrared radiation, the bleachable composition caused exposed portions of the imaging element to be bleached. If further bleaching is needed, the element can subsequently be exposed with near-ultraviolet radiation. A migration imaging method, which does not employ the bleachable composition of the present invention, wherein marking particles are magnetically attracted to the imaging element, is also provided.
    Type: Grant
    Filed: September 27, 1993
    Date of Patent: March 25, 1997
    Assignee: Eastman Kodak Company
    Inventors: Douglas E. Bugner, William Mey, Dennis R. Kamp
  • Patent number: 5612279
    Abstract: In an optical recording sheet having a thermal recording layer containing a colorless or pale colored dye precursor and a color developer reactable with the dye precursor upon heating to develop a color, a dimerized or trimerized urea compound is used as the color developer to obtain an optical recording sheet which is superior in ground color stability and an optical recording sheet having a reversible recordability.
    Type: Grant
    Filed: June 1, 1995
    Date of Patent: March 18, 1997
    Assignee: Nippon Paper Industries, Ltd.
    Inventors: Toshimi Satake, Toshiyuki Takano, Hideki Hayasaka, Yukiko Uehori, Tomoaki Nagai
  • Patent number: 5565306
    Abstract: The present invention provides a thermofixable photosensitive recording material comprising a substrate and a recording layer formed thereon in which a pyrazolone derivative represented by the formula (1 ) shown in the specification and functions as a color former, and a hydroquinone derivative and an acidic substance which function as a color forming auxiliary agent or fixing auxiliary agent are dissolved mutually therein.Further, a binder can be added as required to the recording layer, thereby four components are dissolved mutually therein.
    Type: Grant
    Filed: January 30, 1995
    Date of Patent: October 15, 1996
    Assignee: New OJI Paper Co., Ltd.
    Inventors: Tatsuya Meguro, Nobuhisa Danou, Tetsuo Tsuchida, Naoto Arai
  • Patent number: 5565287
    Abstract: A bleachable composition, including an acid photogenerator and a near-infrared radiation-absorbing dye or pigment, is utilized in a method of migration imaging to prevent unwanted absorptions. This composition can be incorporated either in the thermoplastic imaging surface layer of the imaging element, in the marking particles applied to the element, or both. Alternatively, the components of the bleachable composition can be separated with one in the thermoplastic imaging surface layer and the other in the marking particles. After the imaging element is marked and exposed with near-infrared radiation, the bleachable composition causes exposed portions of the imaging element to be bleached. If further bleaching is needed, the element can subsequently be exposed with near-ultraviolet radiation.
    Type: Grant
    Filed: June 6, 1995
    Date of Patent: October 15, 1996
    Assignee: Eastman Kodak Company
    Inventors: Douglas E. Bugner, William Mey, Dennis R. Kamp
  • Patent number: 5534388
    Abstract: Acid can be generated by exposing a superacid precursor to actinic radiation effective to generate superacid from the superacid precursor and heating the superacid in admixture with a secondary acid generator capable of undergoing thermal decomposition to produce a secondary acid. The superacid catalyzes decomposition of the secondary acid generator, thus increasing the quantity of strong acid present in the medium. The resultant secondary acid can be used to effect a color change in an acid-sensitive material, so providing an imaging process.
    Type: Grant
    Filed: March 20, 1995
    Date of Patent: July 9, 1996
    Assignee: Polaroid Corporation
    Inventors: Jurgen M. Grasshoff, John L. Marshall, Richard A. Minns, Mark R. Mischke, Anthony J. Puttick, Lloyd D. Taylor, Stephen J. Telfer