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Inventor: Matsuoka; Katsumi
Address: Shizuoka, JP
No. of patents: 6
Patents:
| Patent Number |
Title Of Patent |
Date Issued |
| 4920091 |
Recording material |
April 24, 1990 |
| A recording medium comprising at least one electron donating colorless dye and at least one electron accepting compound, wherein the electron accepting compound is a salicylic acid compound represented by formula (I): ##STR1## wherein R represents a divalent group; X and Y, which |
| 4918045 |
Recording material |
April 17, 1990 |
| A recording material comprising a support, a microcapsule containing a substantially colorless electron-donating color former and a solvent, and an electron-accepting developer, wherein the color former is at least one selected from p-substituted aminophenylindolylphthalide derivatives, |
| 4876233 |
Recording material |
October 24, 1989 |
| A recording material comprising a support provided thereon a color developer and microcapsules containing a substantially colorless color former is disclosed, wherein the microcapsules further contains at least one of nickel compounds represented by formulae (I) and (II) shown in the |
| 4871713 |
Heat-sensitive recording material |
October 3, 1989 |
| A heat-sensitive recording material which produces a developed color image with improved light fastness upon application of thermal energy comprising:(1) an electron-donating colorless dye,(2) an electron-accepting compound, and(3) a nickel compound represented by formula (I): ##STR1## |
| 4870048 |
Color developer sheet |
September 26, 1989 |
| A color developer sheet which brings about color development by contact with a substantially colorless electron-donating color former, where said sheet contains an organometallic compound represented by the following general formula (I), (II) or (III) to enhance light resistance and |
| 4808566 |
Recording material |
February 28, 1989 |
| A recording material comprising an electron-donating colorless dye and an electron-accepting compound, wherein said colorless dye is a dimer of a 3-(4-substituted aminoaryl)-3-(substituted indol-3-yl)phthalide compound. The recording material provides an image exhibiting satisfactory fas |
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