US4550329A
Expired / Lapsed
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Heat sensitive record material
Assignee: Hodogaya Chemical Co Ltd
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Filing: 1984-08-31
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Granted: 1985-10-29
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Expires: 2004-08-31
Abstract
Abstract A heat sensitive record material comprising at least one colorless or light-colored electron donative dyestuff and at least one color developing agent represented by the general formula: <IMAGE> where each of R1 and R2 is hydrogen atom, an alkyl group having from 1 to 5 carbon atoms, an alkoxy group having from 1 to 5 carbon atoms or a halogen atom, X is an alkyl group having from 1 to 5 carbon atoms or a halogen atom, Y is a hydroxyl group, an alkyl group having from 1 to 5 carbon atoms or a halogen atom, n is an integer of 1 to 3, and m is an integer of 1 to 4.
Inventors
- 👤 Michihiro Gonda
- 👤 Katsumasa Kitsukawa
- 👤 Susumu Suzuka
- 👤 Mikiko Kanasugi
- 👤 Yutaka Sato
- 👤 Kikuo Otomo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 13:21
CPC Classifications
B; B41; B41M; B41M5/00; B41M5/26; B41M5/30; B41M5/333; B41M5/3333; B41M5/3335
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
116 words
A heat sensitive record material comprising at least one colorless or light-colored electron donative dyestuff and at least one color developing agent represented by the general formula: ##STR3## where each of R 1 and R 2 is a hydrogen atom, an alkyl group having from 1 to 5 carbon atoms, an alkoxy group having from 1 to 5 carbon atoms or a halogen atom, X is an alkyl group having from 1 to 5 carbon atoms or a halogen atom, Y is a hydroxyl group, an alkyl group having from 1 to 5 carbon atoms or a halogen atom, n is an integer of 1 to 3, and m is an integer of 1 to 4.
Claim 2
Dependent Claim
116 words
A heat sensitive record material comprising at least one colorless or light-colored electron donative dyestuff and at least one color developing agent represented by the general formula: ##STR3## where each of R 1 and R 2 is a hydrogen atom, an alkyl group having from 1 to 5 carbon atoms, an alkoxy group having from 1 to 5 carbon atoms or a halogen atom, X is an alkyl group having from 1 to 5 carbon atoms or a halogen atom, Y is a hydroxyl group, an alkyl group having from 1 to 5 carbon atoms or a halogen atom, n is an integer of 1 to 3, and m is an integer of 1 to 4.
Claim 3
Dependent Claim
31 words
The heat sensitive record material according to claim 1, which comprises 1 part by weight of the dyestuff and from 2 to 10 parts by weight of the color developing agent.
Claim 4
Dependent Claim
30 words
The heat sensitive record material according to claim 1, wherein the color developing agent is selected from the group consisting of 2-methyl-4,4'-dihydroxybenzophenone, 2-methyl-4-chloro-4'-hydroxybenzophenone, 2,4-dichloro-4'-hydroxybenzophenone, 2-chloro-4,4'-dihydroxybenzophenone, 2-chloro-4,4'-dihydroxybenzophenone.1/2 hydrate, bis(2-bromo-4-hydroxyphenyl)ketone, and 2-chloro-4-methyl-4'-hydroxybenzophenone.
Claim 5
Dependent Claim
35 words
The heat sensitive record material according to claim 1, wherein the dyestuff is selected from the group consisting of a triarylmethane compound, a diphenylmethane compound, a xanthene compound, a thiazine compound and an oxazine compound.
Claim 6
Dependent Claim
145 words
A heat sensitive record sheet comprising a support sheet and a record layer formed on the support sheet, the record layer being composed essentially of at least one colorless or light-colored electron donative dyestuff, at least one color developing agent and a binder, characterized in that the color developing agent is represented by the general formula: ##STR4## where each of R 1 and R 2 is a hydrogen atom, an alkyl group having from 1 to 5 carbon atoms, an alkoxy group having from 1 to 5 carbon atoms or a halogen atom, X is an alkyl group having from 1 to 5 carbon atoms or a halogen atom, Y is a hydroxyl group, an alkyl group having from 1 to 5 carbon atoms or a halogen atom, n is an integer of 1 to 3, and m is an integer of 1 to 4.
Claim 7
Dependent Claim
145 words
A heat sensitive record sheet comprising a support sheet and a record layer formed on the support sheet, the record layer being composed essentially of at least one colorless or light-colored electron donative dyestuff, at least one color developing agent and a binder, characterized in that the color developing agent is represented by the general formula: ##STR4## where each of R 1 and R 2 is a hydrogen atom, an alkyl group having from 1 to 5 carbon atoms, an alkoxy group having from 1 to 5 carbon atoms or a halogen atom, X is an alkyl group having from 1 to 5 carbon atoms or a halogen atom, Y is a hydroxyl group, an alkyl group having from 1 to 5 carbon atoms or a halogen atom, n is an integer of 1 to 3, and m is an integer of 1 to 4.
Claim 8
Dependent Claim
47 words
The heat sensitive record sheet according to claim 5, wherein the record layer is composed essentially of 1 part by weight of the dyestuff, from 2 to 10 parts by weight of the color developing agent and from 0.3 to 3 parts by weight of the binder.
Claim 9
Dependent Claim
30 words
The heat sensitive record sheet according to claim 5, wherein the color developing agent is selected from the group consisting of 2-methyl-4,4'-dihydroxybenzophenone, 2-methyl-4-chloro-4'-hydroxybenzophenone, 2,4-dichloro-4'-hydroxybenzophenone, 2-chloro-4,4'-dihydroxybenzophenone, 2-chloro-4,4'-dihydroxybenzophenone.1/2 hydrate, bis(2-bromo-4-hydroxyphenyl)ketone, and 2-chloro-4-methyl-4'-hydroxybenzophenone.
Claim 10
Dependent Claim
35 words
The heat sensitive record sheet according to claim 5, wherein the dyestuff is selected from the group consisting of a triarylmethane compound, a diphenylmethane compound, a xanthene compound, a thiazine compound and an oxazine compound.
Claim 11
Dependent Claim
50 words
The heat sensitive record sheet according to claim 5, wherein the binder is selected from the group consisting of polyvinyl alcohol, methyl cellulose, hydroxyethyl cellulose, carboxymethyl cellulose, gum arabic, starch, gelatine, casein, polyvinylpyrrolidone, a styrene-maleic anhydride copolymer, a polyacrylic acid amide, a polyacrylate, a terpene resin and a petroleum resin.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-10-28 | 1989-04-29 | 1989-10-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-10-28 | 1993-04-29 | 1993-10-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-10-28 | 1997-04-29 | 1997-10-29 | $7700.00 | Window Closed / Lapsed |