Patent US4487693A successfully refreshed from Google Patents.
Patent US3132946A successfully refreshed from Google Patents.
US3132946A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Contact screens for photogravure
Assignee: Eastman Kodak Co
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Filing: 1960-01-11
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Granted: 1964-05-12
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Expires: 1980-01-11
Abstract
No abstract record available.
Inventors
- 👤 Martin L Scott
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 03:38
CPC Classifications
G; G03; G03F; G03F5/00; G03F5/14; G03F5/18; G03F5/20
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
133 words
A GRAVURE CONTACT SCREEN COMPRISING A TRANSPARENT SUPPORT SHEET AND ON A SURFACE THEROF A TRASPARENT LAYER CONTAINING GRAINS OF SILVER AND A SUBSTANTIALLY TRANSPARENT DYE BOTH DISTRIBUTED IN THE SAME UNIFORM UNDULATING PATTERN OF LATERAL DOTS WITH AN EFFECTIVELY CLEAR GRID, SAID DOTS HAVING A D MIN. FOR THE COMBINATION OF SILVER GRAINS AND DYE NOT GREATER THAN 1.2 THE DIFFERENCE BETWEEN D MIN. AND D MAX. FOR SAID COMBINATION BEING BETWEEN 0.15 AND 0.70 GREATER THAN THE DIFFERENCE BETWEEN D MIN. AND D MAX. FOR THE DYE ALONE, WHERE D MIN. AND D MAX. ARE THE OPTICAL DENSITY OF THE AREAS OF THE PATTERN HAVING RESPECTIVELY THE MINIMUM DESNISTY AND THE MAXIMUM DENSITY, MEASURED BY LIGHT OF WAVELENGTHS WHICH ARE ABSORBED BY THE DYE, AS WELL AS BY THE SILVER GRAINS.
Claim 2
Dependent Claim
133 words
A GRAVURE CONTACT SCREEN COMPRISING A TRANSPARENT SUPPORT SHEET AND ON A SURFACE THEROF A TRASPARENT LAYER CONTAINING GRAINS OF SILVER AND A SUBSTANTIALLY TRANSPARENT DYE BOTH DISTRIBUTED IN THE SAME UNIFORM UNDULATING PATTERN OF LATERAL DOTS WITH AN EFFECTIVELY CLEAR GRID, SAID DOTS HAVING A D MIN. FOR THE COMBINATION OF SILVER GRAINS AND DYE NOT GREATER THAN 1.2 THE DIFFERENCE BETWEEN D MIN. AND D MAX. FOR SAID COMBINATION BEING BETWEEN 0.15 AND 0.70 GREATER THAN THE DIFFERENCE BETWEEN D MIN. AND D MAX. FOR THE DYE ALONE, WHERE D MIN. AND D MAX. ARE THE OPTICAL DENSITY OF THE AREAS OF THE PATTERN HAVING RESPECTIVELY THE MINIMUM DESNISTY AND THE MAXIMUM DENSITY, MEASURED BY LIGHT OF WAVELENGTHS WHICH ARE ABSORBED BY THE DYE, AS WELL AS BY THE SILVER GRAINS.
References Cited (Backward Citations)
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US2311071A
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US2737457A
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US2689793A
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US2742832A
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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) | 1967-05-12 | 1967-11-11 | 1968-05-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-05-12 | 1971-11-11 | 1972-05-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-05-12 | 1975-11-11 | 1976-05-12 | $7700.00 | Window Closed / Lapsed |