Patent US4453744A successfully refreshed from Google Patents.
US4453744A
Expired / Lapsed
US
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Pressure-sensitive or heat-sensitive recording material
Assignee: BASF Corp
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Filing: 1982-06-07
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Granted: 1984-06-12
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Expires: 2002-06-07
Abstract
Abstract A pressure-sensitive or heat-sensitive recording material which contains in its color reactant system, as developer for the color former, at least one metal-free compound of the formula ##STR1## wherein R is alkyl of 1 to 12 carbon atoms, cycloalkyl, phenyl, benzyl, or phenyl which is substituted by halogen, nitro, methyl, methoxy, ethoxy or methylenedioxy, and X is hydrogen, halogen, carboxyl, lower alkyl or lower alkoxy.
Inventors
- 👤 Albert Wurmli
- 👤 Christel Tempel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 16:36
CPC Classifications
B; B41; B41M; B41M5/00; B41M5/124; B41M5/132; B41M5/155; B41M5/26; B41M5/30; B41M5/333; B41M5/3333; B41M5/3335; B41M5/3336
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
67 words
A record material for use with a color former in pressure-sensitive or heat-sensitive copy systems, comprising a support having therein or thereon a metal-free color developer of the formula ##STR6## wherein R is alkyl of 1 to 12 carbon atoms, cycloalkyl, phenyl, benzyl, or phenyl which is substituted by halogen, nitro, methyl, methoxy, ethoxy or methylenedioxy, and X is hydrogen, halogen, carboxyl, lower alkyl or lower alkoxy.
Claim 2
Dependent Claim
67 words
A record material for use with a color former in pressure-sensitive or heat-sensitive copy systems, comprising a support having therein or thereon a metal-free color developer of the formula ##STR6## wherein R is alkyl of 1 to 12 carbon atoms, cycloalkyl, phenyl, benzyl, or phenyl which is substituted by halogen, nitro, methyl, methoxy, ethoxy or methylenedioxy, and X is hydrogen, halogen, carboxyl, lower alkyl or lower alkoxy.
Claim 3
Dependent Claim
16 words
The record material of claim 1, wherein X is hydrogen, halogen, carboxyl, methyl, methoxy or ethoxy.
Claim 4
Dependent Claim
17 words
The record material of claim 1, wherein R is phenyl, methylphenyl or methoxyphenyl, and X is hydrogen.
Claim 5
Dependent Claim
10 words
The record material of claim 3, wherein R is phenyl.
Claim 6
Dependent Claim
12 words
The record material of claim 4, wherein the color developer is 4-hydroxydiphenylsulfone.
Claim 7
Dependent Claim
29 words
A heat-sensitive record material of claim 1, which contains, in at least one layer, at least one color former, at least one color developer, and at least one binder.
Claim 8
Dependent Claim
14 words
The record material of claim 1, wherein the support further comprises the color former.
Claim 9
Dependent Claim
13 words
The record material of claim 7, wherein the support further comprises a binder.
Claim 10
Dependent Claim
16 words
The record material of claim 7, wherein the color former is dissolved in an organic solvent.
Claim 11
Dependent Claim
15 words
The record material of claim 9, wherein the color former solution is encapsulated in microcapsules.
Claim 12
Dependent Claim
33 words
The record material of claim 10, wherein the support comprises a transfer sheet having the microcapsules coated on the back thereof and a receiving sheet having the color developer on the face thereof.
Claim 13
Dependent Claim
11 words
The record material of claim 1, further comprising another color developer.
References Cited (Backward Citations)
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US3451338A
Cited
US3834929A
Cited
US3937864A
Cited
US4312522A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-06-12 | 1987-12-12 | 1988-06-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-06-12 | 1991-12-12 | 1992-06-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-06-12 | 1995-12-12 | 1996-06-12 | $7700.00 | Window Closed / Lapsed |