US2635960A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High-speed silver dye bleachout taking and printing film
Assignee: GAF Chemicals Corp
•
Filing: 1950-04-18
•
Granted: 1953-04-21
•
Expires: 1970-04-18
Abstract
No abstract record available.
Inventors
- 👤 Joseph A Sprung
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 03:39
CPC Classifications
G; G03; G03C; G03C7/00; G03C7/28
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
38 words
A PHOTOGRAPHIC SILVER HALIDE EMULSION CONTAINING AS A COLOR FORMER A COMPOUND CAPABLE OF REACTING WITH A WATER SOLUBLE IRON SALT TO FORM A CYAN DYE AND SELECTED FROM THE CLASS CONSISTING OF COMPOUNDS OF THE FOLLOWING FORMULAE:
Claim 2
Dependent Claim
38 words
A PHOTOGRAPHIC SILVER HALIDE EMULSION CONTAINING AS A COLOR FORMER A COMPOUND CAPABLE OF REACTING WITH A WATER SOLUBLE IRON SALT TO FORM A CYAN DYE AND SELECTED FROM THE CLASS CONSISTING OF COMPOUNDS OF THE FOLLOWING FORMULAE:
References Cited (Backward Citations)
US2344084A
Cited
US2274782A
Cited
US2318007A
Cited
US2420631A
Cited
US2384897A
Cited
US2353754A
Cited
US2418624A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-04-20 | 1956-10-20 | 1957-04-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-04-20 | 1960-10-20 | 1961-04-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-04-20 | 1964-10-20 | 1965-04-21 | $7700.00 | Window Closed / Lapsed |