Patent US3622336A successfully refreshed from Google Patents.
US3622336A
Expired / Lapsed
US
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Vesicular light-sensitive materials comprising a copolymer of chloroacrylonitrile and methacrylonitrile
Assignee: Individual
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Filing: 1970-01-27
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Granted: 1971-11-23
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Expires: 1990-01-27
Abstract
Abstract This invention is directed to a light-sensitive vesicular imaging composition comprising a sensitizer which liberates gas on irradiation and a binder which is essentially a copolymer of alpha-chloroacrylonitrile and alpha-methacrylonitrile. The composition is coated as a thin film, carefully dried and prenucleated to secure an imaging medium of generally superior qualities and of particularly high photosensitivity. After irradiation with a pattern of actinic radiation, gas release in the selected areas may be developed by overall heating to a visible record.
Inventors
- 👤 Norman Thomas Notley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 13:41
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/72
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
23 words
A material according to claim 1 wherein said light-decomposable solid agent is a diazo compound capable of generating nitrogen upon exposure to radiation.
Claim 2
Dependent Claim
26 words
A material according to claim 1 wherein said copolymer has a ratio of alpha-chloroacrylonitrile to alpha-methacrylonitrile exceeding 1 to 4 but not exceeding 4 to 1.
Claim 3
Dependent Claim
21 words
A material according to claim 1 wherein said copolymer has a ratio of alpha-chloroacrylonitrile to alpha-methacrylonitrile of approximately 1 to 2.
Claim 4
Dependent Claim
65 words
A material according to claim 2 prepared by dissolving the alpha-chloroacrylonitrile/alpha-methacrylonitrile copolymer in butanone and mixing with a solution of said diazo compound in a compatible solvent, coating as a thin film and drying at a temperature between 70* C. and 170* C., heating and prenucleating by passage through a bath of water between 60* C. and 100* C. and flashing overall with actinic light.
Claim 5
Dependent Claim
62 words
A material according to claim 2 prepared by dissolving alpha-chloroacrylonitrile/alpha-methacrylonitrile copolymer in butanone and mixing with a solution of said diazo compound in a compatible solvent, coating as a thin film and drying at a temperature between 70* C. and 170* C. and prenucleating by flashing overall with actinic light to an extent just short of what would have caused overall fogging.
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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) | 1974-11-22 | 1975-05-24 | 1975-11-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-11-22 | 1979-05-24 | 1979-11-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-11-22 | 1983-05-24 | 1983-11-23 | $7700.00 | Window Closed / Lapsed |