Patent US3928686A successfully refreshed from Google Patents.
US3928686A
Expired / Lapsed
US
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Heat-sensitive recording materials
Assignee: Agfa Gevaert NV
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Filing: 1973-02-26
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Granted: 1975-12-23
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Expires: 1993-02-26
Abstract
Abstract A reproduction is obtained by applying a heat pattern to a recording material containing a generally non-light sensitive silver compound which is susceptible to chemical reduction to release silver metal therefrom, while the silver compound is in reactive contact with a 1,2-dihydro-2,2,4-trialkylquinoline reducing agent. The heat effects the reduction reaction in the heated areas releasing silver metal to give a visible indication in the heated areas.
Inventors
- 👤 Albert Lucien Poot
- 👤 Frans Clement Heugebaert
- 👤 Wilhelmus Janssens
- 👤 Antoon Leon Vandenberghe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 23:08
CPC Classifications
C; C07; C07D; C07D471/00; C07D471/02; C07D471/04; C07D215/00; C07D215/02; C07D215/04; C07D215/06; C07D215/16; C07D215/20; C07D221/00; C07D221/02; C07D221/04; C07D221/06; C07D221/10; C07D221/18; G; G03; G03C; G03C1/00; G03C1/494; G03C1/498; G03C1/4989; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31678
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
121 words
A REDORDING PROCESS COMPRISING THE STEP OF APPLYING A HEAT PATTERN CORRESPONDING TO AN IMAGE TO A RECORDING MATERIAL CONTAINING A SILVER COMPOUND THAT IS GENERALLY NON-LIGHT SENSITIVE AT A TEMPERATURE BELOW ABOUT 200*C AND IS ADAPTED TO UNDERGO CHEMICAL REDUCTION TO RELEASE SILVER METAL, WHILE SAID SILVER COMPOUND IS IN REACTIVE CONTACT WITH AN ORGANIC REDUCING COMPOUND CORRESPONDING TO THE FOLLOWING GENERAL FORMULA: 2-(CH3-),2,4-DI(R-),5,6-(-Z-)-1,2-DIHYDROPYRIDINE IN WHICH: R REPRESENTS A C1-C4 ALKYL GROUP, AND Z REPRESENTS THE NECESSARY ATOMS TO CLOSE A BENZENE, NAPHTHALENE, ANTHRACENE, CARBAZOLE, INDOLE, BENZO FURAN, DIBENZOFURAN, PHENOTHIAZINE, FLUORENE, INDENE, XANTHENE, OR QUINOLIN-2-ONE NUCLEUS, WHEREBY SAID SILVER COMPOUND IS REDUCED IN THE HEATED REGIONS OF SAID MATERIAL TO SILVER METAL AND FORMS A VISIBLE IMAGE OF SAID PATTERN.
Claim 2
Dependent Claim
121 words
A REDORDING PROCESS COMPRISING THE STEP OF APPLYING A HEAT PATTERN CORRESPONDING TO AN IMAGE TO A RECORDING MATERIAL CONTAINING A SILVER COMPOUND THAT IS GENERALLY NON-LIGHT SENSITIVE AT A TEMPERATURE BELOW ABOUT 200*C AND IS ADAPTED TO UNDERGO CHEMICAL REDUCTION TO RELEASE SILVER METAL, WHILE SAID SILVER COMPOUND IS IN REACTIVE CONTACT WITH AN ORGANIC REDUCING COMPOUND CORRESPONDING TO THE FOLLOWING GENERAL FORMULA: 2-(CH3-),2,4-DI(R-),5,6-(-Z-)-1,2-DIHYDROPYRIDINE IN WHICH: R REPRESENTS A C1-C4 ALKYL GROUP, AND Z REPRESENTS THE NECESSARY ATOMS TO CLOSE A BENZENE, NAPHTHALENE, ANTHRACENE, CARBAZOLE, INDOLE, BENZO FURAN, DIBENZOFURAN, PHENOTHIAZINE, FLUORENE, INDENE, XANTHENE, OR QUINOLIN-2-ONE NUCLEUS, WHEREBY SAID SILVER COMPOUND IS REDUCED IN THE HEATED REGIONS OF SAID MATERIAL TO SILVER METAL AND FORMS A VISIBLE IMAGE OF SAID PATTERN.
Claim 3
Dependent Claim
31 words
A recording process according to claim 1 wherein said recording material is a recording layer and both said reducing compound and said silver compound are present in the same recording layer.
Claim 4
Dependent Claim
36 words
A recording process according to claim 2 wherein said heat pattern is formed by exposing said recording material to infrared while said layer is in heat-conductive contact with an original to be reproduced carrying infrared-absorbing image-markings.
Claim 5
Dependent Claim
26 words
A recording process according to claim 1 wherein said heat pattern is formed by contacting said recording material with a hot stylus according to said image.
Claim 6
Dependent Claim
33 words
A recording process according to claim 1 wherein said heat pattern is formed by exposing said material to imagewise modulated electromagnetic radiation, which is absorbed in said material and converted therein into heat.
Claim 7
Dependent Claim
26 words
A recording process according to claim 1, wherein the silver compound is a silver salt of an aliphatic carboxylic acid containing at least 14 carbon atoms.
Claim 8
Dependent Claim
17 words
A recording process according to claim 6, wherein the silver salt is silver behenate or silver stearate.
Claim 9
Dependent Claim
28 words
A recording process according to claim 1, wherein the organic reducing agent is used in an amount of at least 0.25 mole per mole of said silver compound.
Claim 10
Dependent Claim
92 words
A SHEET MATERIAL COMPRISING AT LEAST ONE RECORDING LAYER CONTAINING AN ORGANIC REDUCING COMPOUND CORRESPONDING TO THE FHOLLOWING GENERAL FORMULA: 2-(CH3-),2,4-DI(R-),5,6-(-Z-)-1,2-DIHYDROPYRIDINE IN WHICH: R REPRESENTS A C1-C4 ALKYL GROUP, AND Z REPRESENTS THE NECESSARY ATOMS TO CLOSE A BENZENE, NAPHTHALENE, ANTHRACENE, CARBAZOLE, INDOLE, BENZO, FURAN, DIBENZOFURAN, PHENOTHIAZINE, FLUORENE, INDENE, XANTHENE, OR QUINOLIN-2-ONE NUCLEUS, AND HAVING IN SAID LAYER OR IN A CONTACTING LAYER A SILVER COMPOUND REDUCIBLE BY SAID ORGANIC REDUCING COMPOUND TO SILVER METAL UNDER THE INFLUENCE OF HEAT, SILVER COMPOUND BEING GENERALLY NON-LIGHT SENSITIVE AT A TEMPERATURE BELOW ABOUT 200*C.
Claim 11
Dependent Claim
92 words
A SHEET MATERIAL COMPRISING AT LEAST ONE RECORDING LAYER CONTAINING AN ORGANIC REDUCING COMPOUND CORRESPONDING TO THE FHOLLOWING GENERAL FORMULA: 2-(CH3-),2,4-DI(R-),5,6-(-Z-)-1,2-DIHYDROPYRIDINE IN WHICH: R REPRESENTS A C1-C4 ALKYL GROUP, AND Z REPRESENTS THE NECESSARY ATOMS TO CLOSE A BENZENE, NAPHTHALENE, ANTHRACENE, CARBAZOLE, INDOLE, BENZO, FURAN, DIBENZOFURAN, PHENOTHIAZINE, FLUORENE, INDENE, XANTHENE, OR QUINOLIN-2-ONE NUCLEUS, AND HAVING IN SAID LAYER OR IN A CONTACTING LAYER A SILVER COMPOUND REDUCIBLE BY SAID ORGANIC REDUCING COMPOUND TO SILVER METAL UNDER THE INFLUENCE OF HEAT, SILVER COMPOUND BEING GENERALLY NON-LIGHT SENSITIVE AT A TEMPERATURE BELOW ABOUT 200*C.
Claim 12
Dependent Claim
16 words
A sheet material according to claim 9 wherein said recording layer also contains a toning agent.
Claim 13
Dependent Claim
24 words
A sheet material according to claim 9, wherein the silver compound is a silver salt of an aliphatic carboxylic acid containing a thioether group.
Claim 14
Dependent Claim
26 words
A sheet material according to claim 9, wherein the silver compound is a silver salt of an aliphatic carboxylic acid containing at least 14 carbon atoms.
Claim 15
Dependent Claim
17 words
A sheet material according to claim 12, wherein the silver compound is silver behenate or silver stearate.
Claim 16
Dependent Claim
30 words
A sheet material according to claim 9, wherein the reducing compound is present in said layer in an amount of at least 0.25 mole per mole of said silver compound.
Claim 17
Dependent Claim
31 words
A sheet material according to claim 9, wherein the organic reducing compound and said reducible silver compound are used in admixture with a binder applied in layer form on a support.
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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) | 1978-12-22 | 1979-06-23 | 1979-12-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-12-22 | 1983-06-23 | 1983-12-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-12-22 | 1987-06-23 | 1987-12-23 | $7700.00 | Window Closed / Lapsed |