US4082040A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lithographic printing plate
Assignee: Fujifilm Holdings Corp
•
Filing: 1976-07-30
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Granted: 1978-04-04
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Expires: 1996-07-30
Abstract
Abstract A lithographic printing plate comprising a support and a layer of aluminum nitride formed thereon, said layer of aluminum nitride having a thickness of from about 100 A to about 10,000 A.
Inventors
- 👤 Toshiro Yamashina
- 👤 Hirokazu Sakaki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 09:14
CPC Classifications
C; C23; C23C; C23C14/00; C23C14/06; C23C14/0617; B; B41; B41N; B41N1/00; B41N1/006; Y; Y10; Y10S; Y10S430/00; Y10S430/136
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
66 words
A lithographic printing plate comprising a flat, thin support, a layer of aluminum nitride formed thereon by radio frequency reactive sputtering and a light-sensitive layer over said aluminum nitride layer, said layer of aluminum nitride having a thickness of from about 100 A to about 10,000A, and said aluminum nitride surface coated or converted by a hydrophilizing treatment piror to the coating of said light-sensitive layer.
Claim 2
Dependent Claim
66 words
A lithographic printing plate comprising a flat, thin support, a layer of aluminum nitride formed thereon by radio frequency reactive sputtering and a light-sensitive layer over said aluminum nitride layer, said layer of aluminum nitride having a thickness of from about 100 A to about 10,000A, and said aluminum nitride surface coated or converted by a hydrophilizing treatment piror to the coating of said light-sensitive layer.
Claim 3
Dependent Claim
12 words
The lithographic printing plate of claim 1 wherein said support is aluminum.
Claim 4
Dependent Claim
56 words
The lithographic printing plate of claim 1 wherein said light-sensitive layer contains a positive-type light-sensitive diazo compound, a negative-type light-sensitive diazo compound, a light-sensitive unsaturated polyester compound, a combination of a light-sensitive azide compound and a water-soluble polymeric compound, a light-sensitive silver halide emulsion or a combination of a bichromate salt and a water-soluble polymeric compound.
Claim 5
Dependent Claim
72 words
The lithographic printing plate of claim 3 wherein said positive-type light-sensitive diazo compound is a polymer containing an o-quinone diazide, said negative-type light-sensitive diazo compound is p-diazodiphenyl amine compound, said water-soluble polymeric compound used in combination with said light-sensitive azide compound is polyvinyl pyrrolidone or casein, said bichromate salt is a sodium or potassium salt and said water-soluble polymeric compound used with said bichromate salt is polyvinyl alcohol, casein, gelatin or polyacrylamide.
Claim 6
Dependent Claim
21 words
The lithographic printing plate of claim 3 wherein the thickness of the light-sensitive layer is about 0.02 to about 5 microns.
References Cited (Backward Citations)
US3108900A
Cited
US3461054A
Cited
US3679418A
Cited
US3762325A
Cited
GB1201743A
Cited
US3600218A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-04-03 | 1981-10-03 | 1982-04-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-04-03 | 1985-10-03 | 1986-04-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-04-03 | 1989-10-03 | 1990-04-04 | $7700.00 | Window Closed / Lapsed |