US4470057A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thermally-responsive record material
Assignee: WTA Inc
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Filing: 1983-03-24
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Granted: 1984-09-04
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Expires: 2003-03-24
Abstract
Abstract A thermally-sensitive color-forming composition is disclosed which comprises chromogenic material, acidic developer material and a phenylhydroxynaphthoate compound. Record material comprising this color-forming composition exhibits 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 20:08
CPC Classifications
B; B41; B41M; B41M5/00; B41M5/26; B41M5/30; B41M5/337; B41M5/3375
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
60 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, a phenylhydroxynaphthoate compound selected from the group consisting of phenyl-1-hydroxy-2-naphthoate, phenyl-3-hydroxy-2-naphthoate and mixtures thereof, and a suitable binder therefor.
Claim 2
Dependent Claim
60 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, a phenylhydroxynaphthoate compound selected from the group consisting of phenyl-1-hydroxy-2-naphthoate, phenyl-3-hydroxy-2-naphthoate and mixtures thereof, and a suitable binder therefor.
Claim 3
Dependent Claim
13 words
The record material of claim 1 in which the phenylhydroxynaphthoate compound is phenyl-1-hydroxy-2-naphthoate.
Claim 4
Dependent Claim
16 words
The record material of claim 1 in which the acidic developer material is a phenol compound.
Claim 5
Dependent Claim
30 words
The record material of claim 3 in which the phenol compound is selected from the group consisting of 4,4'-isopropylindinediphenol, ethyl-4,4-bis(4-hydroxyphenyl)-pentanoate, n-propyl-4,4-bis(4-hydroxyphenyl)pentanoate, isopropyl-4,4-bis(4-hydroxyphenyl)pentanoate, methyl-4,4-bis(4-hydroxyphenyl)pentanoate, 2,2-bis(4-hydroxyphenyl)-4-methylpentane, p-hydroxybenzophenone, 2,4-dihydroxybenzophenone, 1,1-bis(4-hydroxyphenyl)cyclohexane and mixtures thereof.
Claim 6
Dependent Claim
13 words
The record material of claim 4 in which the phenol compound is 4,4'-isopropylidenediphenol.
Claim 7
Dependent Claim
13 words
The record material of claim 4 in which the phenol compound is isopropyl-4,4-bis(4-hydroxyphenyl)pentanoate.
Claim 8
Dependent Claim
27 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] 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, 5, 6 or 8 in which the binder is selected from the group consisting of polyvinyl alcohol, methylcellulose, methyl-hydroxypropylcellulose, starch, hydroxyethylcellulose and mixtures thereof.
Claim 11
Dependent Claim
25 words
The record material of claim 9 in which the binder is selected from the group consisting of polyvinyl alcohol, methylcellulose, starch and a mixture 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)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-09-04 | 1988-03-05 | 1988-09-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-09-04 | 1992-03-05 | 1992-09-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-09-04 | 1996-03-05 | 1996-09-04 | $7700.00 | Window Closed / Lapsed |