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US4133685A
Expired / Lapsed
US
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Lithographic plate and photoresist having photosensitive layers of diazo and cinnamoylated polyvinyl alcohol materials
Assignee: Imperial Metal and Chemical Co
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Filing: 1978-01-17
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Granted: 1979-01-09
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Expires: 1998-01-17
Abstract
Abstract A photopolymerizable coating over a diazo resin provides a high-speed lithographic plate or photoresist while improving the printing life of the plate while making its development simpler than that of most other photopolymer plates. The photopolymer is a cinnamoylated polyvinyl alcohol resin which is placed over a diazo based material.
Inventors
- 👤 Daniel C. Thomas
- 👤 Jack L. Sorkin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 07:17
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/83; C08G18/831; G; G03; G03F; G03F7/00; G03F7/004; G03F7/09; G03F7/095
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
62 words
A high-speed presensitized plate for lithography or photoresist etching, including in combination a plate base, a sub-base coating over said plate base, a layer of a light sensitive diazo resin condensation product of an aldehyde and a diazonium compound over the sub-base coating and a cinnamate photopolymer coating over said diazo resin layer, wherein the photopolymer coating contains cinnamoylated polyvinyl alcohol polymer.
Claim 2
Dependent Claim
62 words
A high-speed presensitized plate for lithography or photoresist etching, including in combination a plate base, a sub-base coating over said plate base, a layer of a light sensitive diazo resin condensation product of an aldehyde and a diazonium compound over the sub-base coating and a cinnamate photopolymer coating over said diazo resin layer, wherein the photopolymer coating contains cinnamoylated polyvinyl alcohol polymer.
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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) | 1982-01-08 | 1982-07-10 | 1983-01-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-01-08 | 1986-07-10 | 1987-01-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-01-08 | 1990-07-10 | 1991-01-09 | $7700.00 | Window Closed / Lapsed |