US3672898A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multicolor silver halide photographic materials and processes
Assignee: Eastman Kodak Co
•
Filing: 1969-09-29
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Granted: 1972-06-27
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Expires: 1989-09-29
Abstract
Abstract ESSES UTILIZING THE ELEMENTS OF THE INVENTION ARE ALSO DESCRIBED. MULTICOLOR PHOTOGRAPHIC ELEMENTS ARE PROVIDED WHICH CONTAIN YELLOW, MAGENTA AND CYAN DYE FORMING UNITS, EACH OF THE UNITS HAVING A RELATIVE LOG SPECTRAL SENSITIVITY DISTRIBUTION SUCH THAT ACCEPTABLE NEUTRALS AND GOOD COLOR RENDITION ARE OBTAINED UPON EXPOSURE OF THE FILM TO ANY ONE OF A VARIETY OF ILLUMINANTS, SUCH AS DAYLIGHT, TUNGSTEN OR FLUORESCENT ILLUMINANTS. THE SPECTRAL DISTRIBUTION OF EACH DYE FORMING UNIT IN ACCORDANCE WITH THE INVENTION IS SHOWN IN FIGS. 1-3 AND TABLES I-III HEREOF. PHOTOGRAPHIC PROC-
Inventors
- 👤 Judith A Schwan
- 👤 James L Graham
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 18:57
CPC Classifications
G; G03; G03C; G03C7/00; G03C7/30; G03C7/3041
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-06-27 | 1975-12-27 | 1976-06-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-06-27 | 1979-12-27 | 1980-06-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-06-27 | 1983-12-27 | 1984-06-27 | $7700.00 | Window Closed / Lapsed |