Patent US2997388A successfully refreshed from Google Patents.
US2997388A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lippmann emulsion masking process
Assignee: EIDP Inc
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Filing: 1957-07-17
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Granted: 1961-08-22
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Expires: 1977-07-17
Abstract
No abstract record available.
Inventors
- 👤 Blanchard Vernon William
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 19:50
CPC Classifications
G; G03; G03C; G03C7/00; G03C7/18; Y; Y10; Y10S; Y10S430/00; Y10S430/149
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
100 words
A MULTILAYER COLOR PHOTOGRAPHIC DUPLICATING FILM COMPRISING A TRANSPARENT FILM BASE BEARING THREE SUPERPOSED LIGHT-SENSITIVE SILVER HALIDE PRIMARY COLOR RECORD LAYERS AND A YELLOW FILTER STRATUM CONTIGUOUS WITH THE OUTERMOST RECORD LAYER, SAID RECORD LAYERS BEING SO DISPOSED AND OPTICALLY SENSITIZED THAT THE LIGHT-SENSITIVE LAYERS ARE ESSENTIALLY LIGHT-RESPONSIVE IN THE BLUE, GREEN AND RED COLOR REGIONS, RESPECTIVELY, OF THE VISIBLE SPECTRUM, ARE SUBSTANTIALLY INSENSITIVE IN A NARROW REGION BETWEEN THE GREEN AND RED REGIONS OF THE SPECTRUM AND CONTAIN A NON-DIFFUSING ORGANIC COLOR FORMER CONTAINING A COLOR-FORMING NUCLEUS HAVING AS THE ACTIVE COLOR-COUPLING GROUP AN ATOMIC STRUCTURE OF THE FORMULA:
Claim 2
Dependent Claim
100 words
A MULTILAYER COLOR PHOTOGRAPHIC DUPLICATING FILM COMPRISING A TRANSPARENT FILM BASE BEARING THREE SUPERPOSED LIGHT-SENSITIVE SILVER HALIDE PRIMARY COLOR RECORD LAYERS AND A YELLOW FILTER STRATUM CONTIGUOUS WITH THE OUTERMOST RECORD LAYER, SAID RECORD LAYERS BEING SO DISPOSED AND OPTICALLY SENSITIZED THAT THE LIGHT-SENSITIVE LAYERS ARE ESSENTIALLY LIGHT-RESPONSIVE IN THE BLUE, GREEN AND RED COLOR REGIONS, RESPECTIVELY, OF THE VISIBLE SPECTRUM, ARE SUBSTANTIALLY INSENSITIVE IN A NARROW REGION BETWEEN THE GREEN AND RED REGIONS OF THE SPECTRUM AND CONTAIN A NON-DIFFUSING ORGANIC COLOR FORMER CONTAINING A COLOR-FORMING NUCLEUS HAVING AS THE ACTIVE COLOR-COUPLING GROUP AN ATOMIC STRUCTURE OF THE FORMULA:
References Cited (Backward Citations)
US2316803A
Cited
US2258187A
Cited
US2348735A
Cited
US2376132A
Cited
FR912605A
Cited
GB731268A
Cited
GB738978A
Cited
US2927019A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-08-21 | 1965-02-20 | 1965-08-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-08-21 | 1969-02-20 | 1969-08-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-08-21 | 1973-02-20 | 1973-08-22 | $7700.00 | Window Closed / Lapsed |