Record receiver having plural interactive leaves or a colorless – Having a colorless color-former – developer therefor – or... – Method of use – kit – or combined with marking instrument or...
Reexamination Certificate
2007-03-15
2008-09-09
Hess, Bruce H (Department: 1794)
Record receiver having plural interactive leaves or a colorless
Having a colorless color-former, developer therefor, or...
Method of use, kit, or combined with marking instrument or...
C346S135100, C503S207000, C503S216000, C503S226000
Reexamination Certificate
active
07422996
ABSTRACT:
There is provided a reversible thermosensitive recording medium including a support, an intermediate layer, and a thermosensitive recording layer which reversibly changes a color thereof depending on a temperature, wherein the thermosensitive recording layer contains an electron-donating coloring compound, and an electron-accepting compound represented by the following general formula 1:where, n is an integer of 23 or more, and wherein the intermediate layer is disposed between the support and the thermosensitive recording layer, and contains hollow particles having a void ratio of 70% or more, a maximum diameter D100 of 5.0 μm to 10.0 μm, and a ratio D100/D50 of 2.0 to 3.0 where the ratio D100/D50 is a ratio of the maximum diameter D100 to a 50% cumulative particle diameter D50 of the hollow particles.
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European search report in connection with corresponding European patent application No. EP 07 10 4158.
Hayakawa Kunio
Kawahara Shinya
Shimbo Hitoshi
Cooper & Dunham LLP
Hess Bruce H
Ricoh & Company, Ltd.
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