US2956879A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Filter and absorbing dyes for use in photographic emulsions
Assignee: Eastman Kodak Co
•
Filing: 1958-01-07
•
Granted: 1960-10-18
•
Expires: 1978-01-07
Abstract
No abstract record available.
Inventors
- 👤 John H Van Campen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 11:34
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/76; G03C1/825; G03C1/83; G03C1/831
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
39 words
A PHOTOGRAPHIC GELATINO-SILVER-HALIDE EMULSION OPTICALLY SENSTITIZED TO THE GREEN-LIGHT REGION OF THE SPECTRUM CONTAINING FROM ABOUT 0.5 TO 10 GRAMS PER MOLE OF SILVER HALIDE OF A WATER-SOLUBLE AZO DYE SELECTED FROM THOSE REPRESENTED BY THE FOLLOWING GENERAL FORMULA:
Claim 2
Dependent Claim
39 words
A PHOTOGRAPHIC GELATINO-SILVER-HALIDE EMULSION OPTICALLY SENSTITIZED TO THE GREEN-LIGHT REGION OF THE SPECTRUM CONTAINING FROM ABOUT 0.5 TO 10 GRAMS PER MOLE OF SILVER HALIDE OF A WATER-SOLUBLE AZO DYE SELECTED FROM THOSE REPRESENTED BY THE FOLLOWING GENERAL FORMULA:
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) | 1963-10-18 | 1964-04-18 | 1964-10-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-10-18 | 1968-04-18 | 1968-10-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-10-18 | 1972-04-18 | 1972-10-18 | $7700.00 | Window Closed / Lapsed |