US3880659A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Triazolium salt photoreductive imaging
Assignee: Eastman Kodak Co
•
Filing: 1973-08-02
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Granted: 1975-04-29
•
Expires: 1993-08-02
Abstract
Abstract A triazolium salt capable of reduction to an azo-amine dye is present in a radiation-sensitive layer in combination with a photoreductant capable of producing, in the presence of labile hydrogen atoms, a reducing agent precursor in radiation-struck areas of the layer. An image is produced in the layer by bringing the layer into contact with an alkaline medium after imagewise exposure to actinic radiation.
Inventors
- 👤 David S Bailey
- 👤 Michael D Shea
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 09:07
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/72; G03C1/73
Claims Analysis
Total Claims: 50
Claim 1
Independent Claim
67 words
IN A PHOTOGRAPHIC ELEMENT HAVING A SUPPORT AND AT LEAST ONE RADIATION-SENSIIVE IMAGE RECORDING LAYER, THE IMPROVEMENT IN WHICH SAID IMAGE RECORDING LAYER IS COMPRISED OF A SOURCE OF LABILE HYDROGEN ATOMS, A TRIAZOLIUM SALT CAPABLE OF REDUCTION TO AN AZO-AMINE DYE, AND A PHOTOREDUCTANT CAPABLE OF PRODUCING A BASE ACTIVATIBLE REDUCING AGENT PRECURSOR ONE EXPOSURE TO ACTINIC RADIATION IN THE PRESENCE OF SAID LABILE HYDROGEN ATOMS.
Claim 2
Dependent Claim
67 words
IN A PHOTOGRAPHIC ELEMENT HAVING A SUPPORT AND AT LEAST ONE RADIATION-SENSIIVE IMAGE RECORDING LAYER, THE IMPROVEMENT IN WHICH SAID IMAGE RECORDING LAYER IS COMPRISED OF A SOURCE OF LABILE HYDROGEN ATOMS, A TRIAZOLIUM SALT CAPABLE OF REDUCTION TO AN AZO-AMINE DYE, AND A PHOTOREDUCTANT CAPABLE OF PRODUCING A BASE ACTIVATIBLE REDUCING AGENT PRECURSOR ONE EXPOSURE TO ACTINIC RADIATION IN THE PRESENCE OF SAID LABILE HYDROGEN ATOMS.
Claim 3
Dependent Claim
30 words
In a photographic element according to claim 1 the further improvement in which said photographic element incorporates hydrogen source means external of said photoreductant for supplying the labile hydrogen atoms.
Claim 4
Dependent Claim
48 words
In a photographic element according to claim 2 the further improvement in which said external hydrogen source means incorporates a labile hydrogen atom attached to a carbon atom which is also bonded to the oxygen atom of an oxy substituent or the nitrogen atom of an amine substituent.
Claim 5
Dependent Claim
32 words
In a photographic element according to claim 2 the further improvement in which said external hydrogen source means is a polymer and also serves as a binder for said image recording layer.
Claim 6
Dependent Claim
20 words
In a photographic element according to claim 4 the further improvement in which said polymer binder is a cellulosic compound.
Claim 7
Dependent Claim
20 words
In a photographic element according to claim 5 the further improvement in which said polymer binder is cellulose acetate butyrate.
Claim 8
Dependent Claim
20 words
In a photographic element according to claim 2 the further improvement in which said external hydrogen source means is phenyl-1,2-ethanediol.
Claim 9
Dependent Claim
18 words
In a photographic element according to claim 1 the further improvement in which said photoreductant is a diazoanthrone.
Claim 10
Dependent Claim
18 words
In a photographic element according to claim 8 the further improvement in which said diazoanthrone is a 10-diazoanthrone.
Claim 11
Dependent Claim
18 words
In a photographic element according to claim 1 the further improvement in which said photoreductant is a beta-ketosulfide.
Claim 12
Dependent Claim
18 words
In a photographic element according to claim 10 the further improvement in which said photoreductant is a thiochromanone.
Claim 13
Dependent Claim
17 words
In a photographic element according to claim 11 the further improvement in which said photoreductant is 2-(4-tolyl)thiochromanone.
Claim 14
Dependent Claim
38 words
In a photographic element according to claim 1 the further improvement in which said photoreductant is a quinone, a disulfide, a phenazinium salt, a beta-ketosulfide, a nitroarene, a diazoanthrone, or a mixture of two or more of these.
Claim 15
Dependent Claim
39 words
In a photographic element according to claim 1 the further improvement in which said photoreductant incorporates one or more labile hydrogen atoms capable of converting said photoreductant to a base activatible reducing agent precursor on exposure to actinic radiation.
Claim 16
Dependent Claim
45 words
In a photographic element according to claim 14 the further improvement in which said photoreductant incorporates a labile hydrogen atom attached to a carbon atom which is also bonded to the oxygen atom of an oxy substituent or the nitrogen atom of an amine substituent.
Claim 17
Dependent Claim
70 words
In a photographic element according to claim 14 the further improvement in which said photoreductant incorporating one or more labile hydrogen atoms capable of converting said photoreductant to a base activatible reducing agent precursor on exposure to actinic radiation is a quinone with the further provision that said labile hydrogen atom forms a carbon to hydrogen bond which is the third or fourth bond removed from a carbonyl quinone bond.
Claim 18
Dependent Claim
19 words
In a photographic element according to claim 16 the further improvement in which said quinone photoreductant is a 5,8-dihydro-1,4-naphthoquinone.
Claim 19
Dependent Claim
30 words
In a photographic element according to claim 16 the further improvement in which said quinone photoreductant incorporates as a hydrogen source a 2 or 3 position 1 or 2-hydroxyalkyl substituent.
Claim 20
Dependent Claim
28 words
In a photographic element according to claim 16 the further improvement in which said quinone photoreductant incorporates as a hydrogen source a 2 or 3 position aralkoxy substituent.
Claim 21
Dependent Claim
28 words
In a photographic element according to claim 19 the further improvement in which said quinone photoreductant incorporates as a hydrogen source a 2 or 3 position benzyloxy substituent.
Claim 22
Dependent Claim
25 words
In a photographic element according to claim 1 the further improvement in which said triazolium salt contains an aromatic ring fused with its triazole nucleus.
Claim 23
Dependent Claim
20 words
In a photographic element according to claim 21 the further improvement in which said triazolium salt is a benzotriazolium salt.
Claim 24
Dependent Claim
20 words
In a photographic element according to claim 21 the further improvement in which said triazolium salt is a naphthotriazolium salt.
Claim 25
Dependent Claim
72 words
In a photographic element having a support and at least one radiation-sensitive image recording layer, the improvement in which said image recording layer is comprised of a source of labile hydrogen atoms, a photo-reductant capable of producing a base activatible reducing agent precursor on exposure to actinic radiation in the presence of said labile hydrogen atoms, and a triazolium salt capable of reduction to an azo amine dye and of the formula
Claim 26
Dependent Claim
72 words
In a photographic element having a support and at least one radiation-sensitive image recording layer, the improvement in which said image recording layer is comprised of a source of labile hydrogen atoms, a photo-reductant capable of producing a base activatible reducing agent precursor on exposure to actinic radiation in the presence of said labile hydrogen atoms, and a triazolium salt capable of reduction to an azo amine dye and of the formula
Claim 27
Dependent Claim
18 words
In a photographic element according to claim 24 the further improvement in which R'' is a phenyl group.
Claim 28
Dependent Claim
20 words
In a photographic element according to claim 25 the further improvement in which R'' is an alkoxy substituted phenyl group.
Claim 29
Dependent Claim
26 words
In a photographic element according to claim 24 the further improvement in which R'' is a lower alkyl group having from 1 to 6 carbon atoms.
Claim 30
Dependent Claim
24 words
In a photographic element according to claim 24 the further improvement in which at least one of R and R'' is an electronegative group.
Claim 31
Dependent Claim
24 words
In a photographic element according to claim 28 the further improvement in which said electronegative group includes as an electronegative substituent a nitro group.
Claim 32
Dependent Claim
24 words
In a photographic element according to claim 28 the further improvement in which said electronegative group includes as an electronegative substituent a halogen atom.
Claim 33
Dependent Claim
20 words
In a photgraphic element according to claim 24 the further improvement in which said triazolium salt is a bistriazolium salt.
Claim 34
Dependent Claim
20 words
In a photographic element according to claim 31 The further improvement in which R is a phenylene or naphthalene group.
Claim 35
Dependent Claim
19 words
In a photographic element according to claim 24 the further improvement in which said anion is a non-nucleophilic anion.
Claim 36
Dependent Claim
21 words
In a photographic element according to claim 33 the further improvement in which said anion is a tetrafluoroborate or hexafluorophosphate anion.
Claim 37
Dependent Claim
18 words
In a photographic element according to claim 24 the further improvement in which said photoreductant is a quinone.
Claim 38
Dependent Claim
18 words
In a photographic element according to claim 35 the further improvement in which said quinone is a 1,4-benzoquinone.
Claim 39
Dependent Claim
18 words
In a photographic element according to claim 35 the further improvement in which said photoreductant is a 1,4-naphthoquinone.
Claim 40
Dependent Claim
70 words
AN IMAGE RECORDING PROCESS COMPRISING CONVERTING A PHOTOREDUCTANT WITHIN A SELECTED AREAL PORTION OF A RADICATION-SENSITIVE LAYER OF A PHOTOGRAPHIC ELEMENT TO A REDUCING AGENT PRECURSOR BY IMAGEWISE EXPOSING THE PHOTOREDUCTANT TO ACTINIC RADICATION WHILE IN REACTIVE CONTACT WITH LABILE HYDROGEN ATOMS, ACTIVATING THE PRECURSOR WITH A BASE TO FORM A REDUCING AGENT AND REDUCING TRIAZOLIUM SALT PRESENT WITHIN THE SELECTED AREAL PORTIONS CONTAINING THE RECUCING AGENT TO AZOAMINE DYE.
Claim 41
Dependent Claim
70 words
AN IMAGE RECORDING PROCESS COMPRISING CONVERTING A PHOTOREDUCTANT WITHIN A SELECTED AREAL PORTION OF A RADICATION-SENSITIVE LAYER OF A PHOTOGRAPHIC ELEMENT TO A REDUCING AGENT PRECURSOR BY IMAGEWISE EXPOSING THE PHOTOREDUCTANT TO ACTINIC RADICATION WHILE IN REACTIVE CONTACT WITH LABILE HYDROGEN ATOMS, ACTIVATING THE PRECURSOR WITH A BASE TO FORM A REDUCING AGENT AND REDUCING TRIAZOLIUM SALT PRESENT WITHIN THE SELECTED AREAL PORTIONS CONTAINING THE RECUCING AGENT TO AZOAMINE DYE.
Claim 42
Dependent Claim
16 words
An image recording process according to claim 38 comprising utilizing the base in the gaseous phase.
Claim 43
Dependent Claim
16 words
An image recording process according to claim 38 in which the precursor is activated by ammonia.
Claim 44
Dependent Claim
13 words
An image recording process according to claim 38 comprising chelating the azo-amine dye.
Claim 45
Dependent Claim
22 words
An image recording process according to claim 38 in which the radiation-sensitive layer of the photographic element is exposed to visible light.
Claim 46
Dependent Claim
22 words
An image recording process according to claim 38 in which the radiation-sensitive layer of the photographic element is exposed to ultra-violet radiation.
Claim 47
Dependent Claim
50 words
An image recording process comprising imagewise exposing a radiation-sensitive layer of a photographic element containing a quinone photoreductant, a source of labile hydrogen atoms and a triazolium salt, activating the radiation-struck quinone photoreductant with a base and reducing the triazolium salt adjacent the activated radiation-struck quinone photoreductant to azo-amine dye.
Claim 48
Dependent Claim
50 words
An image recording process comprising imagewise exposing a radiation-sensitive layer of a photographic element containing a quinone photoreductant, a source of labile hydrogen atoms and a triazolium salt, activating the radiation-struck quinone photoreductant with a base and reducing the triazolium salt adjacent the activated radiation-struck quinone photoreductant to azo-amine dye.
Claim 49
Dependent Claim
45 words
An image recording process according to claim 44 in which a binder is provided to act as a source of labile hydrogen atoms and transferring a portion of these labile hydrogen atoms from the binder to the radiation-struck quinone to form a reducing agent precursor.
Claim 50
Dependent Claim
19 words
An image recording process according to claim 44 in which said quinone incorporates said source of labile hydrogen atoms.
References Cited (Backward Citations)
US3185567A
Cited
US3257205A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-04-28 | 1978-10-28 | 1979-04-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-04-28 | 1982-10-28 | 1983-04-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-04-28 | 1986-10-28 | 1987-04-29 | $7700.00 | Window Closed / Lapsed |