US 6,555,705 B1Granted

Thermosensitive recording material and phthalic acid derivatives for use in the same

AssigneeRicoh Company, Ltd.

InventorsHiromi Furuya, Keishi Taniguchi, Hideo Suzaki

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Abstract

A thermosensitive recording material composed of a support, and a thermosensitive recording layer formed on the support, containing a leuco dye and a color developer capable of inducing color formation in the leuco dye upon application of heat thereto, the color developer including at least one compound selected from the group consisting of the compounds of formulas (I) to (IV):

Claims2

Dependent claims

A phthalic acid derivative of formula (V):

Dependencies are inferred from the claim text.

Facts

Application: 08/510,129Filed 1 Aug 1995 · division
Priority: JP 5-06277226 Feb 1993
Granted: 29 Apr 2003
Term ends: Not estimatedThe source records don’t support an estimate.

Classification8 codes

C07C 323/62
Containing thio groups and carboxyl groups bound to the same carbon skeleton: having the sulfur atom of at least one of the thio groups bound to a…
B41M 5/3335
Non-macromolecular compounds: compounds containing phenolic or carboxylic acid groups or metal salts thereof
C07C 65/24
Containing ether groups, [IMAGE cpc-sch-C07C-0958.gif] groups,[IMAGE cpc-sch-C07C-0959.gif] groups, or[IMAGE cpc-sch-C07C-0960.gif] groups: polycyclic
C07C 309/77
Having sulfur atoms of esterified sulfo groups bound to carbon atoms of six-membered aromatic rings of a carbon skeleton: containing carboxyl…

Family

Application08/201,993Parent of this division · filed 25 Feb 1994
US 5,482,912 AParent of this division
US 6,555,705 B1This patent

From the US filing history. Foreign family members aren’t listed.

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