US4628336A
Expired / Lapsed
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Thermosensitive recording sheet
Assignee: Jujo Paper Co Ltd
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Filing: 1985-07-11
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Granted: 1986-12-09
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Expires: 2005-07-11
Abstract
Abstract A thermosensitive recording sheet having a thermosensitive color developing layer containing a basic leuco dye and an organic color developer, said layer containing a polyphenyl ester compound of the general formula <IMAGE> (I) wherein R1 and R2, independently from each other, represent an alkyl group, a cycloalkyl group, or an aryl, aralkyl or aryloxyalkyl group which may have at least one substituent selected from the class consisting of halogen atoms, nitro groups, hydroxyl groups, lower alkyl groups and lower alkoxy groups.
Inventors
- 👤 Toshimi Satake
- 👤 Toshiaki Minami
- 👤 Fumio Fujimura
- 👤 Satoshi Oda
- 👤 Masato Magami
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 19:19
CPC Classifications
B; B41; B41M; B41M5/00; B41M5/26; B41M5/30; B41M5/337; B41M5/3375
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
83 words
A thermosensitive recording sheet having a thermosensitive color developing layer containing a basic leuco dye and an organic color developer, said layer containing a polyphenyl ester compound of the general formula ##STR20## wherein R 1 and R 2 , independently from each other, represent an alkyl group, a cycloalkyl group, or an aryl, aralkyl or aryloxyalkyl group which may have at least one substituent selected from the class consisting of halogen atoms, nitro groups, hydroxyl groups, lower alkyl groups and lower alkoxy groups.
Claim 2
Dependent Claim
83 words
A thermosensitive recording sheet having a thermosensitive color developing layer containing a basic leuco dye and an organic color developer, said layer containing a polyphenyl ester compound of the general formula ##STR20## wherein R 1 and R 2 , independently from each other, represent an alkyl group, a cycloalkyl group, or an aryl, aralkyl or aryloxyalkyl group which may have at least one substituent selected from the class consisting of halogen atoms, nitro groups, hydroxyl groups, lower alkyl groups and lower alkoxy groups.
Claim 3
Dependent Claim
113 words
The thermosetting recording sheet of claim 1 wherein R1 and R2, independently from each other, represent an alkyl group having 1 to 12 carbon atoms, a cycloalkyl group having 3 to 10 carbon atoms, or a group of the following formula ##STR21## wherein A and B, independently from each other, represents a halogen atom, a nitro group, a hydroxyl group, a lower alkyl group or a lower alkoxy group, l is an integer of 1 to 5, and m and n are each 0 or an integer of 1 to 3, provided that when m and n are 2 or 3, two or three groups A or B may be identical or different.
Claim 4
Dependent Claim
30 words
The thermosensitive recording material of claim 1 wherein the polyphenyl ester compound is represented by the following general formula ##STR22## wherein R 1 and R 2 are as defined above.
Claim 5
Dependent Claim
32 words
The thermosensitive recording sheet of claim 3 wherein R represents an alkyl group having 1 to 12 carbon atoms, a cyclohexyl group, a benzyl group, a phenethyl group, or a phenoxymethyl group.
Claim 6
Dependent Claim
22 words
The thermosensitive recording sheet of claim 3 wherein the polyphenyl ester compound is a compound of the formula (I-2) or (I-3): ##STR23##
Claim 7
Dependent Claim
16 words
The thermosensitive recording sheet of claim 5 wherein the organic color developer is a benzyl 4-hydroxybenzoate.
Claim 8
Dependent Claim
32 words
The thermosensitive recording sheet of claim 1 wherein the layer contains 0.1 to 10 parts by weight, per 1 part by weight of the basic leuco dye, of the polyphenyl ester compound.
Claim 9
Dependent Claim
16 words
The thermosensitive recording sheet of claim 1 wherein the organic color developer is a benzyl 4-hydroxybenzoate.
References Cited (Backward Citations)
JPS57182483A
Cited
JPS57182494A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-12-08 | 1990-06-09 | 1990-12-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-12-08 | 1994-06-09 | 1994-12-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-12-08 | 1998-06-09 | 1998-12-09 | $7700.00 | Window Closed / Lapsed |