Patent US2807725A successfully refreshed from Google Patents.
US2807725A
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Color radiography process
Assignee: GERARD LEMEAC VIGNEAU
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Filing: 1954-01-27
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Granted: 1957-09-24
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Expires: 1974-01-27
Abstract
No abstract record available.
Inventors
- 👤 Schwerin Andre Kurt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 13:07
CPC Classifications
G; G03; G03C; G03C5/00; G03C5/16; Y; Y10; Y10S; Y10S430/00; Y10S430/167; Y10S430/168
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
76 words
IN COMBINATION WITH A PHOTOGRAPHIC COLOR FILM OF THE TYPE HAVING A PLURALITY OF EMULSION LAYERS SUPERPOSED ON A FILM BASE, EACH EMULSION LAYER PRODUCING A DIFFERENT COLOR, A PAIR OF INTENSIFYING SCREENS OF THE PHOSPHOR TYPE DISPOSED RESPECTIVELY IN JUXTAPOSITION TO THE FRONT AND BACK OF SAID FILM, THE PHOSPHORS OF SAID SCREENS HAVLIGHT EMITTED BY EACH SCREEN IS PREDOMINATLY OF THE SAME COLOR AS THAT TO WHIHC THE NEAREST ADJACENT FILM EMULSION IS SENSITIZED.
Claim 2
Dependent Claim
76 words
IN COMBINATION WITH A PHOTOGRAPHIC COLOR FILM OF THE TYPE HAVING A PLURALITY OF EMULSION LAYERS SUPERPOSED ON A FILM BASE, EACH EMULSION LAYER PRODUCING A DIFFERENT COLOR, A PAIR OF INTENSIFYING SCREENS OF THE PHOSPHOR TYPE DISPOSED RESPECTIVELY IN JUXTAPOSITION TO THE FRONT AND BACK OF SAID FILM, THE PHOSPHORS OF SAID SCREENS HAVLIGHT EMITTED BY EACH SCREEN IS PREDOMINATLY OF THE SAME COLOR AS THAT TO WHIHC THE NEAREST ADJACENT FILM EMULSION IS SENSITIZED.
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) | 1960-09-23 | 1961-03-25 | 1961-09-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-09-23 | 1965-03-25 | 1965-09-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-09-23 | 1969-03-25 | 1969-09-24 | $7700.00 | Window Closed / Lapsed |