US3615565A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photosensitive article and method of using same incorporating leuco dye precursors and quinone activators
Assignee: Arthur D Little Inc
•
Filing: 1969-05-08
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Granted: 1971-10-26
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Expires: 1989-05-08
Abstract
Abstract A direct printout photographic system suitable for photocopy work, particularly for microfilm blowups. A leuco base of a dior triarylmethane, xanthene, thioxanthene, selenaxanthene, anthracene or acridine dye and a quinone activator, supported in a binder or distributed within a portion of a substrate, form the photosensitive system which is activated when exposed to a range of electromagnetic radiation extending from the ultraviolet through the visible spectrum. The system is adaptable to making monochrome and black-and-white prints and transparencies.
Inventors
- 👤 Joanne C Gerlach
- 👤 Kenneth D Jordan
- 👤 Ian D Robinson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 17:43
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/72; G03C1/73; G03C1/732
Claims Analysis
Total Claims: 27
Claim 1
Independent Claim
16 words
A photosensitive composition in accordance with claim 1 wherein said dye precursor is leuco crystal violet.
Claim 2
Dependent Claim
94 words
an activator for said dye precursor which is a quinone having two intracyclic carbonyl groups attached to intracyclic carbon atoms in a conjugated carbocyclic ring system and which is selected from the group consisting of benzoquinone, monosubstituted benzoquinones, naphthoquinone, mono- and disubstituted naphthoquinones, anthraquinone, mono-, di- and trisubstituted anthraquinones, phenanthrenequinone, mono- and disubstituted phenanthrenequinones, acenaphthenequinone, mono-and disubstituted acenaphthenequinoNes, chrysenequinone, mono-and disubstituted chrysenequinones, 4,4''-diphenoquinone, mono-and disubstituted 4,4''-diphenoquinones, 4,4''-stilbenequinone, and mono- and disubstituted 4,4''-stilbenequinones wherein the substituents in the substituted quinones may be alkyl, aryl, halogen, aralkyl,-SO3Na or -NR2 wherein R is H, alkyl or aryl.
Claim 3
Dependent Claim
15 words
A photosensitive composition in accordance with claim 1 wherein said dye precursor is 3,6-bis(dimethylamino)-9-(p-dimethylaminophenyl) xanthene.
Claim 4
Dependent Claim
14 words
A photosensitive composition in accordance with claim 1 wherein said dye precursor is leucopararosaniline.
Claim 5
Dependent Claim
13 words
A photosensitive composition in accordance with claim 1 wherein said activator is 2-t-butylanthraquinone.
Claim 6
Dependent Claim
13 words
A photosensitive composition in accordance with claim 1 wherein said activator is 1-(N-methylamino)anthraquinone.
Claim 7
Dependent Claim
14 words
A photosensitive composition in accordance with claim 1 which is activated by ultraviolet radiation.
Claim 8
Dependent Claim
14 words
A photosensitive composition in accordance with claim 1 which is activated by visible light.
Claim 9
Dependent Claim
25 words
A photosensitive composition in accordance with claim 1 wherein the mole ratio of activator to dye precursor ranges between about 0.01-to-1 to about 100-to-1 .
Claim 10
Dependent Claim
16 words
A photosensitive composition in accordance with claim 1 wherein said composition is incorporated in a binder.
Claim 11
Dependent Claim
14 words
A photosensitive composition in accordance with claim 10 including a plasticizer for said binder.
Claim 12
Dependent Claim
13 words
A photosensitive composition in accordance with claim 10 wherein said binder is nitrocellulose.
Claim 13
Dependent Claim
14 words
A photosensitive composition in accordance with claim 10 wherein said binder is ethyl cellulose.
Claim 14
Dependent Claim
15 words
A photosensitive composition in accordance with claim 10 wherein said binder is cellulose acetate butyrate.
Claim 15
Dependent Claim
28 words
A photosensitive composition in accordance with claim 1 including one or more additives serving as color filters, oxidation inhibitors and stabilizers or fixing agents for said dye precursor.
Claim 16
Dependent Claim
24 words
A photosensitive composition in accordance with claim 15 wherein said additive is contained within capsules which may be broken by heating or through pressure.
Claim 17
Dependent Claim
45 words
A photosensitive article suitable for exposure to radiant energy for forming an image by direct printout, comprising in combination a. a substrate; and b. at least one layer of a photosensitive composition affixed to said substrate in a binder, said photosensitive composition comprising in combination
Claim 18
Dependent Claim
15 words
A photosensitive article in accordance with claim 17 wherein said substrate is an opaque paper.
Claim 19
Dependent Claim
16 words
A photosensitive article in accordance with claim 17 wherein said substrate is an essentially transparent film.
Claim 20
Dependent Claim
57 words
A photosensitive article in accordance with claim 17 further characterized by having an intermediate coating layer interposed between said substrate and said layer of said photosensitive composition, said coating layer serving as a chemical barrier, as a modifier of the physical properties of said substrate, or as a modifier of the optical properties of said photosensitive composition.
Claim 21
Independent Claim
155 words
A method of forming an image of a transparency by direct printout, characterized by exposing a photosensitive article through said transparency to electromagnetic radiation of a predetermined wavelength range and fixing the image in the resulting print, said photosensitive article comprising in combination a dye procursor which is a leuco base of a di- or triarylmethane, xanthene, thioxanthene, selenaxanthene, anthracene or acridine dye and an activator which is a quinone having two intracyclic carbonyl groups attached to intracyclic carbon atoms in a conjugated carbocyclic ring system and which is selected from the group consisting of benzoquinone, monosubstituted benzoquinones, naphthoquinone, mono- and disubstituted naphthoquinones, anthraquinone, mono-, di- and trisubstituted anthraquinones, phenanthrenequinone, mono- and disubstituted phenanthrenequinones, acenaphthenequinone, mono-and disubstituted acenaphthenequinones, chrysenequinone, mono-and disubstituted chrysenequinones, 4,4''-diphenoquinone, mono-and disubstituted 4,4''-diphenoquinones, 4,4''-stilbenequinone, and mono- and disubstituted 4,4''-stilbenequinones wherein the substituents in the substituted quinones may be alkyl, aryl, halogen, aralkyl, -SO3Na or -NR2 wherein R is H, alkyl or aryl.
Claim 22
Dependent Claim
18 words
A method in accordance with claim 21 wherein said transparency is placed in contact with said photosensitive article.
Claim 23
Dependent Claim
42 words
A method in accordance with claim 21 wherein optical elements adapted to project and enlarge an image are placed between said transparency and said photosensitive article, whereby the image of said transparency is optically projected as an enlargement onto said photosensitive article.
Claim 24
Dependent Claim
25 words
A method in accordance with claim 21 wherein said fixing comprises removing at least the dye precursor which was not activated to form said image.
Claim 25
Dependent Claim
33 words
A method in accordance with claim 24 wherein said removing comprises washing said print with a liquid which is a solvent for said dye precursor and a nonsolvent for the dye image formed.
Claim 26
Dependent Claim
37 words
A method in accordance with claim 21 wherein said fixing comprises destroying the dye precursor which was not activated to form said image with a reactant capable of converting said dye precursor to a colorless, light-insensitive compound.
Claim 27
Dependent Claim
18 words
A method in accordance with claim 21 wherein said fixing comprises applying an oxygen-barrier overcoat to said print.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-10-25 | 1975-04-26 | 1975-10-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-10-25 | 1979-04-26 | 1979-10-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-10-25 | 1983-04-26 | 1983-10-26 | $7700.00 | Window Closed / Lapsed |