Patent US2742833A successfully refreshed from Google Patents.
US2742833A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Optically sensitized prescreened photographic material
Assignee: Eastman Kodak Co
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Filing: 1951-06-29
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Granted: 1956-04-24
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Expires: 1971-06-29
Abstract
No abstract record available.
Inventors
- 👤 Ralph M Evans
- 👤 Robert E Stauffer
- 👤 Henry C Yutzy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 09:39
CPC Classifications
G; G03; G03F; G03F5/00; Y; Y10; Y10S; Y10S430/00; Y10S430/15
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
60 words
A PHOTOGRAPHIC HALFTONE MATERIAL COMPRISING A FLAT SUPPORT AND A PHOTOSENSITIVE SILVER HALIDE EMULSION LAYER ON THE SUPPORT WITH A HALFTONE PATTERN OF SQUARE ELEMENTAL AREAS JUXTAPOSED WITH NO INTERVENING AREAS, SAID SQUARE ELEMENTAL AREAS HAVING A RATIO OF GREEN TO BLUE SENSITIVITY GREATER AT THE CENTERS THAN AT THE CORNERS, AND HAVING SUBSTANTIALLY UNIFORM SENSITIVITY TO BLUE LIGHT THROUGHOUT.
Claim 2
Dependent Claim
60 words
A PHOTOGRAPHIC HALFTONE MATERIAL COMPRISING A FLAT SUPPORT AND A PHOTOSENSITIVE SILVER HALIDE EMULSION LAYER ON THE SUPPORT WITH A HALFTONE PATTERN OF SQUARE ELEMENTAL AREAS JUXTAPOSED WITH NO INTERVENING AREAS, SAID SQUARE ELEMENTAL AREAS HAVING A RATIO OF GREEN TO BLUE SENSITIVITY GREATER AT THE CENTERS THAN AT THE CORNERS, AND HAVING SUBSTANTIALLY UNIFORM SENSITIVITY TO BLUE LIGHT THROUGHOUT.
References Cited (Backward Citations)
US804039A
Cited
US875770A
Cited
GB250770A
Cited
US1918208A
Cited
US2009424A
Cited
US2061182A
Cited
US2316643A
Cited
US2407211A
Cited
FR937885A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-04-24 | 1959-10-24 | 1960-04-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-04-24 | 1963-10-24 | 1964-04-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-04-24 | 1967-10-24 | 1968-04-24 | $7700.00 | Window Closed / Lapsed |