Patent US3965282A successfully refreshed from Google Patents.
US3965282A
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Thermographic recording material
Assignee: Agfa Gevaert NV
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Filing: 1975-04-29
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Granted: 1976-06-22
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Expires: 1995-04-29
Abstract
Abstract A thermographic recording process in which a dye is produced by bringing image-wise into reactive contact with the aid of heat a dye precursor compound and a compound with acid reaction corresponding to the following general formula: -COOH Z PARALLEL PARALLEL -COOR wherein :
Inventors
- 👤 Wilhelmus Janssens
- 👤 Daniel Alois Claeys
- 👤 Raymond Gerard Lemahieu
- 👤 Jozef Aime Dierckx
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 13:23
CPC Classifications
C; C07; C07C; C07C205/00; C07C205/49; C07C205/57; B; B41; B41M; B41M5/00; B41M5/26; B41M5/30; B41M5/333; B41M5/3333; B41M5/3335; Y; Y10; Y10S; Y10S430/00; Y10S430/165; Y10T; Y10T428/00; Y10T428/27; Y10T428/273; Y10T428/277; Y10T428/31504; Y10T428/31536; Y10T428/31786
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
100 words
A transfer sheet suitable for marking coloured images by a process involving heat-induced transfer of a compound with acid reaction to a receptor sheet incorporating a dye precursor compound, said transfer sheet incorporating as compound with acid reaction a compound corresponding to the following general formula: ##EQU8## wherein: Z represents the necessary atoms to close an unsubstituted benzene nucleus, a halogen-substituted benzene nucleus or a nitro-substituted benzene nucleus, and R represents an unsubstituted aliphatic group containing at least 4 carbon atoms, cycloaliphatic group or an aliphatic group substituted with hydroxyl, with an etherified hydroxyl group or with an acyloxy group.
Claim 2
Dependent Claim
100 words
A transfer sheet suitable for marking coloured images by a process involving heat-induced transfer of a compound with acid reaction to a receptor sheet incorporating a dye precursor compound, said transfer sheet incorporating as compound with acid reaction a compound corresponding to the following general formula: ##EQU8## wherein: Z represents the necessary atoms to close an unsubstituted benzene nucleus, a halogen-substituted benzene nucleus or a nitro-substituted benzene nucleus, and R represents an unsubstituted aliphatic group containing at least 4 carbon atoms, cycloaliphatic group or an aliphatic group substituted with hydroxyl, with an etherified hydroxyl group or with an acyloxy group.
Claim 3
Dependent Claim
19 words
A transfer sheet according to claim 1, wherein Z represents the necessary atoms to close a chlorine-substituted benzene nucleus.
Claim 4
Dependent Claim
23 words
A transfer sheet according to claim 1, wherein R represents an alkyl group of at least 4 carbon atoms and substituted with hydroxyl.
Claim 5
Dependent Claim
26 words
A transfer sheet according to claim 1, wherein said sheet contains the compound with acid reaction in an amount of at least 0.1 g per sq.m.
Claim 6
Dependent Claim
17 words
A transfer sheet according to claim 1, wherein the compound with acid reaction is applied in ethylcellulose.
Claim 7
Dependent Claim
108 words
A mono-sheet thermosensitive recording material containing a dye precursor compound and a compound with acid reaction, in which material the compound with acid reaction and the dry precursor compound at a temperature below 60°C are kept out of direct chemical contact and the compound with acid reaction corresponds to the following general formula: ##EQU9## wherein: Z represents the necessary atoms to close an unsubstituted benzene nucleus, a halogen-substituted benzene nucleus or a nitro-substituted benzene nucleus, and R represents an unsubstituted aliphatic group containing at least 4 carbon atoms, a cycloaliphatic group or an aliphatic group substituted with hydroxyl, with an etherified hydroxyl group or with an acyloxy group.
Claim 8
Dependent Claim
108 words
A mono-sheet thermosensitive recording material containing a dye precursor compound and a compound with acid reaction, in which material the compound with acid reaction and the dry precursor compound at a temperature below 60°C are kept out of direct chemical contact and the compound with acid reaction corresponds to the following general formula: ##EQU9## wherein: Z represents the necessary atoms to close an unsubstituted benzene nucleus, a halogen-substituted benzene nucleus or a nitro-substituted benzene nucleus, and R represents an unsubstituted aliphatic group containing at least 4 carbon atoms, a cycloaliphatic group or an aliphatic group substituted with hydroxyl, with an etherified hydroxyl group or with an acyloxy group.
Claim 9
Dependent Claim
21 words
A mono-sheet thermosensitive recording material according to claim 6, wherein Z represents the necessary atoms to close a chlorine-substituted benzene nucleus.
Claim 10
Dependent Claim
26 words
A mono-sheet thermosensitive recording material according to claim 6, wherein R represents an alkyl group of at least 4 carbon atoms substituted with an hydroxyl group.
Claim 11
Dependent Claim
33 words
A mono-sheet thermosensitive recording material according to claim 6, wherein the dye precursor compound and the compound with acid reaction are kept out of chemical reactive contact below 60°C in separate binder layers.
Claim 12
Dependent Claim
42 words
A mono-sheet thermosensitive recording material according to claim 9, wherein one of the binder layers is a top layer that has been applied from a solution in a volatile liquid, which is a non-solvent for the binder of the subjacent other layer.
Claim 13
Dependent Claim
71 words
A mono-sheet thermosensitive recording material according to claim 6, wherein the recording material is a clear transparent heat-sensitive sheet material useful in the preparation of a colour projection transparency by thermographic copying procedures and includes a first layer containing the dye precursor compound in a vinyl chloride polymer binder and a second coating bonded to said first layer containing the compound with acid reaction in a binder mainly containing cellulose nitrate.
Claim 14
Dependent Claim
26 words
A mono-sheet thermosensitive recording material according to claim 11, wherein the second layer contains as sole binding agent cellulose nitrate and a plasticizer for cellulose nitrate.
Claim 15
Dependent Claim
20 words
A mono-sheet thermosensitive recording material according to claim 12, wherein the plasticizer is polyvinyl butyral, a polyalkylene glycol or camphor.
Claim 16
Dependent Claim
38 words
A mono-sheet thermosensitive recording material according to claim 6, wherein the dye precursor compound in its binder layer is used in the ratio of 1 part by weight to about 20 to 3 parts by weight of binder.
Claim 17
Dependent Claim
40 words
A mono-sheet thermosensitive recording material according to claim 6, wherein the compound with acid reaction is present in its binder layer in a ratio from about 0.1 to about 0.8 parts by weight to 1 part by weight of binder.
Claim 18
Dependent Claim
17 words
A mono-sheet thermosensitive recording material according to claim 6, wherein said material comprises a transparent resin support.
References Cited (Backward Citations)
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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) | 1979-06-22 | 1979-12-22 | 1980-06-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-06-22 | 1983-12-22 | 1984-06-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-06-22 | 1987-12-22 | 1988-06-22 | $7700.00 | Window Closed / Lapsed |