US2942974A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photosensitive resists and photomechanical process
Assignee: Konica Minolta Graphic Imaging USA Inc
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Filing: 1956-05-10
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Granted: 1960-06-28
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Expires: 1976-05-10
Abstract
No abstract record available.
Inventors
- 👤 Schwarz George
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 06:10
CPC Classifications
G; G03; G03F; G03F7/00; G03F7/004; G03F7/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
79 words
A PHOTOLITHOGRAPHIC PROCESS WHICH INCLUDES EXPOSING TO LIGHT A LITHOGRAPHIC PLATE COATED WITH A LIGHT SENSITIVE LAYER OF BACTERIAL DEXTRAN AND A WATER SOLUBLE CHROMATE SALT, REMOVING UNEXPOSED PORTIONS OF THE DEXTRAN LAYER WITH AN AQUEOUS DEVELOPER, ETCHING THE PLATE, COATING THE PLATE AND REMAINING DEXTRAN LAYER WITH A GREASY INK AND REMOVING THE DEXTRAN BY A WATER SOLUTION OF A SOLUBILIZING AGENT SELECTED FROM THE GROUP CONSISTING OF ALKALINE MATERIALS AND ACIDIC COMPLEXING AGENTS FOR THE CHROMATE RESIDUE.
Claim 2
Dependent Claim
79 words
A PHOTOLITHOGRAPHIC PROCESS WHICH INCLUDES EXPOSING TO LIGHT A LITHOGRAPHIC PLATE COATED WITH A LIGHT SENSITIVE LAYER OF BACTERIAL DEXTRAN AND A WATER SOLUBLE CHROMATE SALT, REMOVING UNEXPOSED PORTIONS OF THE DEXTRAN LAYER WITH AN AQUEOUS DEVELOPER, ETCHING THE PLATE, COATING THE PLATE AND REMAINING DEXTRAN LAYER WITH A GREASY INK AND REMOVING THE DEXTRAN BY A WATER SOLUTION OF A SOLUBILIZING AGENT SELECTED FROM THE GROUP CONSISTING OF ALKALINE MATERIALS AND ACIDIC COMPLEXING AGENTS FOR THE CHROMATE RESIDUE.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-06-28 | 1963-12-28 | 1964-06-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-06-28 | 1967-12-28 | 1968-06-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-06-28 | 1971-12-28 | 1972-06-28 | $7700.00 | Window Closed / Lapsed |