| Patent Number |
Title Of Patent |
Date Issued |
| 7608139 |
Erasable image forming material |
October 27, 2009 |
| An erasable image forming material is provided, which includes a binder resin, and a color former and a developer dispersed in the binder resin. The color former is amorphous. |
| 7569515 |
Erasable image forming material |
August 4, 2009 |
| 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 .alpha.-methylstyrene, the first and second binder resins being |
| 7378373 |
Erasable image forming material |
May 27, 2008 |
| An erasable image forming material includes a color former, a developer, a binder resin and 0.5 wt % or less of a plasticizer. The erasable image forming material exhibits improved erasure performance. |
| 7354885 |
Erasable image forming material |
April 8, 2008 |
| 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 |
| 7276465 |
Erasable image forming material |
October 2, 2007 |
| An erasable image forming material includes a color former, a developer, and a binder resin, the color former containing Crystal Violet Lactone and a specific fluorane compound can enhance light fastness as well as heat decolorizing performance. |
| 7208449 |
Decolorable image forming material |
April 24, 2007 |
| A decolorable image forming material contains a color former and a developer, that develop a colored state through interaction therebetween and can be decolored by heating or contact with a solvent, in which the developer contains two or more compounds whose deference in molecular we |
| 6857573 |
Method and apparatus for reading invisible symbol |
February 22, 2005 |
| An article including a substrate and an invisible symbol on the substrate is disclosed. The invisible symbol is formed by a compound which includes a cyano group and has an infrared absorption wavelength apart from that of the substrate when heated. |
| 6712272 |
Method and apparatus for reading invisible symbol |
March 30, 2004 |
| An invisible symbol reading apparatus includes a heating unit for heating an invisible symbol formed on a sample and containing a material which emits infrared light when heated, a detecting unit for detecting infrared light emitted from the invisible symbol, and an arithmetic operation |
| 6471126 |
Method and apparatus for reading invisible symbol |
October 29, 2002 |
| An invisible symbol reading apparatus includes a heating unit for heating an invisible symbol formed on a sample and containing a material which emits infrared light when heated, a detecting unit for detecting infrared light emitted from the invisible symbol, and an arithmetic operation |
| 6375742 |
Apparatus for processing paper sheets to decolor an image formed thereon |
April 23, 2002 |
| A decoloring apparatus for an image forming material comprising means for bringing a solvent into contact with an image forming material formed on a paper sheet and containing a color former, a developer and a decolorizer, and means for removing a residual solvent from the paper sheet. |
| 6329317 |
Decoloring method of decolorizable image forming material |
December 11, 2001 |
| A method of decoloring an image formed on a paper sheet by using an image forming material containing a color former, a developer and a decolorizer, comprising the steps of bringing a solvent into contact with the image forming material for decoloring the image, and removing the residual |
| 6277208 |
Method of decoloring an image forming material formed on a paper sheet |
August 21, 2001 |
| An image forming material formed on a paper sheet and containing a color former, a developer and a decolorizer, is decolored by heating of the image forming material, contacting the image forming material with a solvent optionally containing a decolorizer, and removing a residual sol |
| 6248692 |
Erasable image forming material |
June 19, 2001 |
| An erasable image forming material includes a color former, a developer, and a decolorizer and is erasable by contact with an erase solvent. Free energy .alpha. required for the decolorizer and the developer to form a complex and free energy .beta. required for the color former and the |
| 6203603 |
Erasable image forming material |
March 20, 2001 |
| An erasable image forming material includes a color former, a developer, a binder resin, and a polymer decolorizer having an electron donating group capable of physically or chemically adsorbing the developer. This polymer decolorizer is, e.g., a polymer compound having a sugar skeleton, |
| 6168081 |
Method and apparatus for reading invisible symbol |
January 2, 2001 |
| An invisible symbol reading apparatus includes a heating unit for heating an invisible symbol formed on a sample and containing a material which emits infrared light when heated, a detecting unit for detecting infrared light emitted from the invisible symbol, and an arithmetic operation |
| 6054870 |
Liquid crystal device evaluation method and apparatus |
April 25, 2000 |
| Impurities mixed in the liquid crystal device are detected by a method comprising the steps of applying a DC electric field to a liquid crystal device having a liquid crystal layer between a pair of electrodes, and irradiating the liquid crystal device with light within a specific wa |
| 6017386 |
Decolorizable ink and printer |
January 25, 2000 |
| A decolorizable image forming material comprising a color former, a developer and a decolorizer, the decolorizer comprising a highly amorphous phase separation inhibitor and a slightly amorphous phase separation inhibitor. A cyclic sugar alcohol is used as the highly amorphous phase |
| 5971276 |
Method of reading pattern and optical signal reader |
October 26, 1999 |
| A method of reading a pattern including steps of heating or irradiating with infrared light a substrate on which a transparent pattern is formed, the pattern containing a material capable of absorbing infrared light of specific wavelength such as polyacrylonitrile, and detecting infrared |
| 5922115 |
Decolorizable ink and printer |
July 13, 1999 |
| Decolorizable ink consisting of an ink composition dispersed in a solvent, the ink composition comprising a color former, a developer and a decolorizer, wherein the color former and developer are in a colored state by interaction between them and the decolorizer has a property to dissolv |
| 5866471 |
Method of forming semiconductor thin film and method of fabricating solar cell |
February 2, 1999 |
| A silicon thin film is formed by coating on a substrate a solution of polysilane represented by the general formula --(SiR.sup.1.sub.2).sub.n --, where R.sup.1 substituents are selected from the group consisting of hydrogen, an alkyl group having two or more carbon atoms and a .beta. |
| 5694188 |
Reflection type liquid crystal display device having comb-shaped wall electrode |
December 2, 1997 |
| A liquid crystal display device comprises two substrates opposed to each other, a comb-shaped wall electrode formed to correspond to each pixel of an array defined by vertical and horizontal wires formed on the substrate, the comb-shaped wall electrode having a plurality of elemental ele |
| 5621334 |
Method and apparatus for evaluating impurities in a liquid crystal device |
April 15, 1997 |
| A liquid crystal device evaluation method including the steps of irradiating infrared a liquid crystal device with light while applying an electric field to the liquid crystal device, and obtaining a field response curve corresponding to a change in infrared light intensity with time |
| 5543949 |
LCD polymer orienting film with a dipole moment greater than 20 debye and is bound to the substr |
August 6, 1996 |
| A liquid crystal device including two substrates each having a liquid crystal orienting film formed on each opposing surface, and a liquid crystal sealed between these substrates, wherein a liquid crystal orienting film formed on the surface of at least one of the two substrates is c |
| 5307187 |
Liquid crystal element with higher resistivity in the encapsulation medium than in the liquid cr |
April 26, 1994 |
| A liquid crystal display element comprises a liquid crystal material having a resistivity .rho..sub.LC (.OMEGA..multidot.cm) and a polymer matrix material having a resistivity .rho..sub.p (.OMEGA..multidot.cm). The ratio .rho..sub.LC /.rho..sub.p is defined to fall within a range of betw |
| 4652511 |
Process for producing resin composition useful as electrophotograhic toner |
March 24, 1987 |
| A process for producing a resin composition which comprises suspension-polymerizing at least one vinyl monomer in an aqueous medium in the presence of a dispersing agent, said suspension polymerization being carried out using a nonionic dispersant as said dispersing agent in the pres |
