Patent US4590148A successfully refreshed from Google Patents.
US4590148A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for producing light sensitive lithographic plate requiring no dampening solution
Assignee: Fujifilm Holdings Corp
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Filing: 1985-03-12
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Granted: 1986-05-20
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Expires: 2005-03-12
Abstract
Abstract A process for producing a light-sensitive lithographic plate requiring no dampening solution comprising (1) carrying out corona discharge treatment on the surface of a silicone rubber layer of a light-sensitive lithographic plate requiring no dampening solution wherein the silicone rubber layer is the top layer, (2) spraying a solution or dispersion containing a non-volatile solid component on said silicone rubber layer, and (3) drying to provide fine projection patterns on said silicone rubber layer.
Inventors
- 👤 Hiroshi Takahashi
- 👤 Hiroyuki Tamaki
- 👤 Chikashi Ohishi
- 👤 Keisuke Shiba
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 11:24
CPC Classifications
G; G03; G03F; G03F7/00; G03F7/004; G03F7/075; G03F7/0752; G03F7/09; G03F7/115; Y; Y10; Y10S; Y10S430/00; Y10S430/138; Y10S430/151; Y10S430/162
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
102 words
A process for producing a light-sensitive lithographic plate requiring no dampening solution comprising (1) carrying out corona discharge treatment on the surface of a silicone rubber layer of a light-sensitive lithographic plate requiring no dampening solution wherein the silicone rubber layer is the top layer, (2) spraying a solution or dispersion containing a non-volatile solid component on said silicone rubber layer, and (3) drying to provide fine projection patterns, wherein said fine projection patterns have an average height in the range of about 0.5 to 50μ and are present in an amount of 1 to 1000/mm 2 on said silicone rubber layer.
Claim 2
Dependent Claim
102 words
A process for producing a light-sensitive lithographic plate requiring no dampening solution comprising (1) carrying out corona discharge treatment on the surface of a silicone rubber layer of a light-sensitive lithographic plate requiring no dampening solution wherein the silicone rubber layer is the top layer, (2) spraying a solution or dispersion containing a non-volatile solid component on said silicone rubber layer, and (3) drying to provide fine projection patterns, wherein said fine projection patterns have an average height in the range of about 0.5 to 50μ and are present in an amount of 1 to 1000/mm 2 on said silicone rubber layer.
Claim 3
Dependent Claim
54 words
The process as claimed in claim 1, wherein said silicone rubber layer is composed of a linear organopolysiloxane having the following repeating units as a main component: ##STR4## wherein R is an alkyl group having 1 to 10 carbon atoms or a phenyl group wherein 60% or more of R is a methyl group.
Claim 4
Dependent Claim
27 words
The process as claimed in claim 1, wherein the electric discharge frequency of said Corona discharge treatment is in the range of 50 Hz to 5,000 KHz.
Claim 5
Dependent Claim
46 words
The process as claimed in claim 1, wherein said non-volatile solid component is selected from the group consisting of gum arabi, gelatine, casein, celluloses, soluble starch, polyvinyl alcohol, polyethylene oxide, polyacrylic acid, polyacrylamide, polyvinyl methyl ether, epoxy resin, phenol resin, polyamide, polyvinyl butyral, and polyacrylate copolymers.
Claim 6
Dependent Claim
36 words
The process as claimed in claim 1, wherein the average height of said fine projections is in the range of about 1 to 10μ and are present in an amount of 5 to 500/mm 2 .
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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) | 1989-05-19 | 1989-11-18 | 1990-05-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-05-19 | 1993-11-18 | 1994-05-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-05-19 | 1997-11-18 | 1998-05-20 | $7700.00 | Window Closed / Lapsed |