US3141771A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Aldehyde scavengers for photographic silver halide developers
Assignee: Eastman Kodak Co
•
Filing: 1961-02-01
•
Granted: 1964-07-21
•
Expires: 1981-02-01
Abstract
No abstract record available.
Inventors
- 👤 Charleton C Bard
- 👤 Deane S Thomas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 00:30
CPC Classifications
G; G03; G03C; G03C7/00; G03C7/30; G03C7/407; G03C7/413; G03C7/4136
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
57 words
A PHOTOGRAPHIC DEVELOPER FOR PRODUCING A COLOR IMAGE COMPRISING AN AQUEOUS ALKALINE SOLUTION OF A PPHENYLENE-DIAMINE PHOTOGRAPHIC DEVELOPING AGENT, A PN-ARALKYLAMINOPHENOL, AND A COMPOUND SELECTED FROM THE CLASS CONSISTING OF (A) A PRIMARY AMINE SELECTED FROM THE CLASS CONSISTING OF HYDROXYLAMINE, SEMICARBAZIDE, HYDRAZINE, CARBOHYDRAZIDE, BIURET, AMINOGUANIDINE, METHYLSEMICARBAZIDE AND WATER-SOLUBLE SALTS OF SAID COMPOUNDS, AND (B) GIRARD''S REAGENT.
Claim 2
Dependent Claim
57 words
A PHOTOGRAPHIC DEVELOPER FOR PRODUCING A COLOR IMAGE COMPRISING AN AQUEOUS ALKALINE SOLUTION OF A PPHENYLENE-DIAMINE PHOTOGRAPHIC DEVELOPING AGENT, A PN-ARALKYLAMINOPHENOL, AND A COMPOUND SELECTED FROM THE CLASS CONSISTING OF (A) A PRIMARY AMINE SELECTED FROM THE CLASS CONSISTING OF HYDROXYLAMINE, SEMICARBAZIDE, HYDRAZINE, CARBOHYDRAZIDE, BIURET, AMINOGUANIDINE, METHYLSEMICARBAZIDE AND WATER-SOLUBLE SALTS OF SAID COMPOUNDS, AND (B) GIRARD''S REAGENT.
References Cited (Backward Citations)
US2309492A
Cited
US2353690A
Cited
US2419975A
Cited
US2675314A
Cited
GB811185A
Cited
US2875049A
Cited
US2983606A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-07-21 | 1968-01-20 | 1968-07-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-07-21 | 1972-01-20 | 1972-07-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-07-21 | 1976-01-20 | 1976-07-21 | $7700.00 | Window Closed / Lapsed |