US2756145A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Silver halide emulsions containing a diamino diphenyl amine stabilizer
Assignee: Eastman Kodak Co
•
Filing: 1953-12-31
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Granted: 1956-07-24
•
Expires: 1973-12-31
Abstract
No abstract record available.
Inventors
- 👤 Clinton S Ballard
- 👤 Wesley G Lowe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 10:09
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/005; G03C1/06; G03C1/34
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
35 words
A SILVER HALIDE PHOTOSENSITIVE EMULSION CONTAINS AGAINST DETERIORATION BY AGING, WHICH EMULSION CONTAINS 2-32 MGS. PER MOLE OF SILVER HALIDE OF A COMPOUND SELECTED FROM THE GROUP CONSISTING OF DIAMINODIPHENYL AMINES HAVING THE STRUCTURAL FORMULA:
Claim 2
Dependent Claim
35 words
A SILVER HALIDE PHOTOSENSITIVE EMULSION CONTAINS AGAINST DETERIORATION BY AGING, WHICH EMULSION CONTAINS 2-32 MGS. PER MOLE OF SILVER HALIDE OF A COMPOUND SELECTED FROM THE GROUP CONSISTING OF DIAMINODIPHENYL AMINES HAVING THE STRUCTURAL FORMULA:
References Cited (Backward Citations)
US2124159A
Cited
US2440110A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-07-24 | 1960-01-23 | 1960-07-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-07-24 | 1964-01-23 | 1964-07-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-07-24 | 1968-01-23 | 1968-07-24 | $7700.00 | Window Closed / Lapsed |