US4535347A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thermally-responsive record material
Assignee: APPTLETON PAPERS Inc
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Filing: 1984-05-07
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Granted: 1985-08-13
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Expires: 2004-05-07
Abstract
Abstract A thermally-sensitive color-forming composition is disclosed which comprises chromogenic material, acidic developer material and a hydroxyanilide compound. Record material comprising this color-forming composition exhibits an absence of image bloom and improved color-forming efficiency and/or image density.
Inventors
- 👤 Kenneth D. Glanz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 06:53
CPC Classifications
B; B41; B41M; B41M5/00; B41M5/26; B41M5/30; B41M5/337; B41M5/3375
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
72 words
A thermally-responsive record material comprising a support member bearing a thermally-sensitive color-forming composition comprising chromogenic material and acidic developer material in contiguous relationship, whereby the melting or sublimation of either material produces a change in color by reaction between the two, one or more hydroxyanilide compounds represented by the formula: ##STR2## wherein R represents a straight or branched alkyl group of not more than 17 carbon atoms; and a suitable binder therefor.
Claim 2
Dependent Claim
72 words
A thermally-responsive record material comprising a support member bearing a thermally-sensitive color-forming composition comprising chromogenic material and acidic developer material in contiguous relationship, whereby the melting or sublimation of either material produces a change in color by reaction between the two, one or more hydroxyanilide compounds represented by the formula: ##STR2## wherein R represents a straight or branched alkyl group of not more than 17 carbon atoms; and a suitable binder therefor.
Claim 3
Dependent Claim
24 words
The record material of claim 1 in which the hydroxyanilide compound is selected from the group consisting of p-hydroxyacetanilide; p-hydroxybutyranilide; p-hydroxynonananilide; p-hydroxylauranilide; and p-hydroxyoctadecananilide.
Claim 4
Dependent Claim
15 words
The record material of claim 2 in which the hydroxyanilide compound is p-hydroxynonananilide or p-hydroxylauranilide.
Claim 5
Dependent Claim
16 words
The record material of claim 1 in which the acidic developer material is a phenol compound.
Claim 6
Dependent Claim
26 words
The record material of claim 4 in which the phenol compound is selected from the group consisting of 4,4'-isopropylidinediphenol, 2,2-bis(4-hydroxyphenyl)-4-methylpentane; ethyl-4,4-bis(4-hydroxyphenyl)pentanoate; isopropyl-4,4-bis(4-hydroxyphenyl)pentanoate; methyl-4,4-bis(4-hydroxyphenyl)pentanoate; and mixtures thereof.
Claim 7
Dependent Claim
15 words
The record material of claim 5 in which the phenol compound is 4,4'-isopropylidenediphenol or 2,2-bis(4-hydroxyphenyl)-4-methylpentane.
Claim 8
Dependent Claim
28 words
The record material of claim 1 in which the chromogenic material is selected from the group consisting of 3-diethylamino-6-methyl-7-anilinofluoran; 7-(1-ethyl-2-methylindol-3-yl)-7-(4-diethylamino-2-ethoxyphenyl)-5,7-dihydrofuro[3,4-b]pyridin-5-one; 3-diethylamino-7-(2-chloroanilino)fluoran; 3-(N-methylcyclohexylamino)-6-methyl-7-anilinofluoran; 7-(1-octyl-2-methylindol-3-yl)-7-(4-diethylamino-2-ethoxyphenyl)-5,7-dihydrofuro[3,4-b]pyridin-5-one; 3'-phenyl-7-dibenzylamino-2,2'-spiro-di-[2H-1-benzopyran]; 3,3-bis(4-dimethylaminophenyl)-6-dimethylaminophthalide and mixtures thereof.
Claim 9
Dependent Claim
13 words
The record material of claim 7 in which the chromogenic material is 3-diethylamino-6-methyl-7-anilinofluoran.
Claim 10
Dependent Claim
30 words
The record material of claim 1, 3, 6 or 8 in which the binder is selected from the group consisting of polyvinyl alcohol, methylcellulose, hydroxypropylmethylcellulose, starch, hydroxyethylcellulose and mixtures thereof.
Claim 11
Dependent Claim
24 words
The record material of claim 9 in which the binder is selected from the group consisting of polyvinyl alcohol, methylcellulose, starch and mixtures thereof.
Claim 12
Dependent Claim
19 words
The record material of claim 10 in which the binder is a mixture of polyvinyl alcohol, methylcellulose and starch.
References Cited (Backward Citations)
JPS57126693A
Cited
JPS57137186A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-08-12 | 1989-02-11 | 1989-08-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-08-12 | 1993-02-11 | 1993-08-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-08-12 | 1997-02-11 | 1997-08-13 | $7700.00 | Window Closed / Lapsed |