US3933497A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photosensitive azido processes
Assignee: Wyeth Holdings LLC
•
Filing: 1974-06-27
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Granted: 1976-01-20
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Expires: 1994-06-27
Abstract
Abstract Dry photoimaging processes and compositions employing photosensitive coatings of volatile peri-substituted aromatic azido compounds in a permeable film-forming plastic are disclosed.
Inventors
- 👤 Balwant Singh
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 13:46
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/695
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
101 words
A dry imaging process comprising the consecutive steps of: a. imaging a light sensitive material comprising a suitable photographic substrate having a coating deposited thereon, said coating consisting essentially of a permeable film-forming plastic having a photosensitive, volatile, peri-substituted naphthalene azido compound dispersed therein wherein the azido compound has one of the following substituents oriented peri to the azido group: amino, hydroxy azido, trifluoroacetamido, or ##EQU3## wherein R is lower alkyl having from C 1 -C 6 or phenyl by irradiating with patterned activating radiation to produce a visible image; and heating the material to evaporate the unreacted naphthalene azido compound.
Claim 2
Dependent Claim
101 words
A dry imaging process comprising the consecutive steps of: a. imaging a light sensitive material comprising a suitable photographic substrate having a coating deposited thereon, said coating consisting essentially of a permeable film-forming plastic having a photosensitive, volatile, peri-substituted naphthalene azido compound dispersed therein wherein the azido compound has one of the following substituents oriented peri to the azido group: amino, hydroxy azido, trifluoroacetamido, or ##EQU3## wherein R is lower alkyl having from C 1 -C 6 or phenyl by irradiating with patterned activating radiation to produce a visible image; and heating the material to evaporate the unreacted naphthalene azido compound.
Claim 3
Dependent Claim
14 words
A dry imaging process according to claim 1 wherein the radiation is ultraviolet light.
Claim 4
Dependent Claim
27 words
A dry imaging process according to claim 1 wherein the photosensitive material is heated to a temperature in the range of from about 100°C. to about 150°C.
Claim 5
Dependent Claim
38 words
A dry imaging process according to claim 1 employing a photosensitive material wherein the azido compound is 1,8-diazidonaphthalene, 1-acetamido-8-azidonaphthalene, 1-azido-8-trifluoracetamidoaphthalene, 1-amino-8-azidonaphthalene or 1-azido-8-hydroxynaphthalene and further comprising a step of modifying the image to more neutral tones by heating.
Claim 6
Dependent Claim
63 words
A dry imaging process according to claim 3 wherein the azido compound is 1,8-diazidonaphthalene, and the coating is polyvinyl chloride having from about 3 to about 15 percent by weight of the azido compound and a thickness of from about 0.05 mils to about 1.00 mils, further comprising a step of modifying the image to more neutral tones by exposure to ultraviolet light.
Claim 7
Dependent Claim
39 words
A dry imaging process according to claim 1 with the photosensitive material further comprising a sensitizer of ultraviolet or visible light sensitizers with the coating, wherein the radiation is visible light or a mixture of visible and ultraviolet light.
Claim 8
Dependent Claim
56 words
A dry imaging process according to claim 6 comprising the consecutive steps of: a. imaging a material wherein the sensitizer is a volatile, visible light sensitizer by irradiating with a patterned mixture of visible and ultraviolet light; and b. fixing the imaged material by heating to volatilize the unirradiated azido compound and the visible light sensitizer.
Claim 9
Dependent Claim
23 words
A dry imaging process according to claim 1 wherein the sensitizer is a visible light sensitizer and the activating radiation is visible light.
Claim 10
Dependent Claim
21 words
A dry imaging process according to claim 7 wherein the azido compound is 1,8-diazidonaphthalene and the sensitizer is fluorenone or benzanthrone.
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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) | 1979-01-19 | 1979-07-21 | 1980-01-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-01-19 | 1983-07-21 | 1984-01-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-01-19 | 1987-07-21 | 1988-01-20 | $7700.00 | Window Closed / Lapsed |