Patent US4082901A successfully refreshed from Google Patents.
US4082901A
Expired / Lapsed
US
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Thermographic material
Assignee: Agfa Gevaert NV
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Filing: 1975-12-05
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Granted: 1978-04-04
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Expires: 1995-12-05
Abstract
Abstract A recording process, wherein an organic reducing compound being present in a supported or self-supporting layer and corresponding to one of the following general formulae (I) and (II): ##STR1## wherein: R 1 represents hydrogen, an aliphatic group or a cycloaliphatic group, and R 2 represents an aliphatic oxy group, a cycloaliphatic oxy group, an aryloxy group, an amino group of the formula ##STR2## in which R 3 and R 4 (same or different) represent hydrogen, an aliphatic, a cycloaliphatic or an aromatic group or R 3 and R 4 represent together the necessary atoms to close a heterocyclic nitrogen containing nucleus; ##STR3## wherein: R 5 represents an aliphatic, cycloaliphatic, aromatic or heterocyclic group, is caused to effect in said layer under the influence of information-wise heating an information-wise reduction of a reducible reaction partner.
Inventors
- 👤 Urbain Leopold Laridon
- 👤 Albert Lucien Poot
- 👤 Jozef Frans Willems
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 19:58
CPC Classifications
B; B41; B41M; B41M5/00; B41M5/26; B41M5/30; Y; Y10; Y10S; Y10S428/00; Y10S428/913
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
91 words
A thermographic light insensitive recording material comprising a support and uniformly carried on said support a reducing compound according to one of the following general formulae I or II and a reducible noble metal salt that is generally non-light-sensitive in the temperature range of 50° to 200° C, said compounds being mutually interreactive in an oxidation-reduction reaction to at least one visible distinct reaction product when heated together at a temperature above 60° C: ##STR16## wherein: R 1 represents hydrogen, an aliphatic group containing up to about four carbon atoms; and
Claim 2
Dependent Claim
91 words
A thermographic light insensitive recording material comprising a support and uniformly carried on said support a reducing compound according to one of the following general formulae I or II and a reducible noble metal salt that is generally non-light-sensitive in the temperature range of 50° to 200° C, said compounds being mutually interreactive in an oxidation-reduction reaction to at least one visible distinct reaction product when heated together at a temperature above 60° C: ##STR16## wherein: R 1 represents hydrogen, an aliphatic group containing up to about four carbon atoms; and
Claim 3
Dependent Claim
98 words
R 2 represents an alkoxy group containing up to 18 carbon atoms, an aryloxy group, an amino group of the formula ##STR17## in which R 3 and R 4 (same or different) represent hydrogen, an aliphatic group or an aromatic group, or R 3 and R 4 represent together the necessary atoms to close a 5- or 6-membered heterocyclic nitrogen containing nucleus; and ##STR18## wherein: R 5 is an aromatic group, said organic reducing compound being present in an effective amount to reduce said salt when said heat pattern has a temperature of at least about 60° C.
Claim 4
Dependent Claim
98 words
R 2 represents an alkoxy group containing up to 18 carbon atoms, an aryloxy group, an amino group of the formula ##STR17## in which R 3 and R 4 (same or different) represent hydrogen, an aliphatic group or an aromatic group, or R 3 and R 4 represent together the necessary atoms to close a 5- or 6-membered heterocyclic nitrogen containing nucleus; and ##STR18## wherein: R 5 is an aromatic group, said organic reducing compound being present in an effective amount to reduce said salt when said heat pattern has a temperature of at least about 60° C.
Claim 5
Dependent Claim
29 words
A recording material according to claim 1, wherein R 2 is ##STR19## and wherein R 3 and R 4 represent together the necessary atoms to close a piperidine nucleus.
Claim 6
Dependent Claim
25 words
A recording material according to claim 1, wherein R 2 is the group ##STR20## and R 3 represent hydrogen and R 4 an alkyl group.
Claim 7
Dependent Claim
29 words
A recording material according to claim 1, wherein the organic reducing compound and said salt are used in admixture with a binder applied in layer form to a support.
Claim 8
Dependent Claim
23 words
A recording material according to claim 1, wherein said salt is a silver salt of an aliphatic carboxylic acid containing a thioether group.
Claim 9
Dependent Claim
30 words
A recording material according to claim 5, wherein the reducing compound is present in said material in an amount of at least 0.25 mole per mole of said silver salt.
Claim 10
Dependent Claim
23 words
A recording material according to claim 5, wherein the organic reducing compound and silver salt are present in conjunction with a toning agent.
Claim 11
Dependent Claim
25 words
A recording material according to claim 1, wherein said salt is a silver salt of an aliphatic carboxylic acid containing at least 13 carbon atoms.
Claim 12
Dependent Claim
17 words
A recording material according to claim 8, wherein the silver salt is silver behenate or silver stearate.
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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) | 1981-04-03 | 1981-10-03 | 1982-04-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-04-03 | 1985-10-03 | 1986-04-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-04-03 | 1989-10-03 | 1990-04-04 | $7700.00 | Window Closed / Lapsed |