US2756147A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tetrazaindene stabilizer for photographic emulsions sensitized with alkylene oxide polymers
Assignee: Eastman Kodak Co
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Filing: 1955-07-05
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Granted: 1956-07-24
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Expires: 1975-07-05
Abstract
No abstract record available.
Inventors
- 👤 George A Reynolds
- 👤 Jr John Sagal
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 20:01
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/005; G03C1/04; G03C1/043; G03C1/06; G03C1/34
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
108 words
A PHOTOGRAPHIC SILVER HALIDE EMULSION SENSITIZED WITH AN ALKYLENE OXIDE POLYMER SELECTED FROM THE CLASS CONSISTING OF (1) POLYALKYLENE GLYCOLS, (2) CONDENSATION PRODUCTS OF AN ALKYLENE OXIDE WITH A GLYCOL, (3) CONDENSATION PRODUCTS OF AN ALKYLENE OXIDE WITH AN ALIPHATIC COMPOUND SELECTED FROM THE GROUP CONSISTING OF MONOHYDRIC ALCOHOLS, ACIDS AND AMINES, (4) CONDENSATION PRODUCTS OF AN ALKYLENE OXIDE WITH A PHENOL, AND (5) CONDENSATION PRODUCTS OF AN ALKYLENE OXIDE WITH HEXITOL ING DEHYDRATION PRODUCTS, SAID ALKYLENE OXIDE POLYFROM 2 TO 4 CARBON ATOMSAND SAID ALKYLENE OXIDE POLYMER HAVING A MOLECULAR WEIGHT OF AT LEAST 300, SAID PHOTOGRAPHIC SILVER HALIDE EMULSION CONTAINING 5-CARBOXY-4HYDROXY-1,3,3A,7-TETRAZAINDENE AS A FOG INHIBITING AGENT.
Claim 2
Dependent Claim
108 words
A PHOTOGRAPHIC SILVER HALIDE EMULSION SENSITIZED WITH AN ALKYLENE OXIDE POLYMER SELECTED FROM THE CLASS CONSISTING OF (1) POLYALKYLENE GLYCOLS, (2) CONDENSATION PRODUCTS OF AN ALKYLENE OXIDE WITH A GLYCOL, (3) CONDENSATION PRODUCTS OF AN ALKYLENE OXIDE WITH AN ALIPHATIC COMPOUND SELECTED FROM THE GROUP CONSISTING OF MONOHYDRIC ALCOHOLS, ACIDS AND AMINES, (4) CONDENSATION PRODUCTS OF AN ALKYLENE OXIDE WITH A PHENOL, AND (5) CONDENSATION PRODUCTS OF AN ALKYLENE OXIDE WITH HEXITOL ING DEHYDRATION PRODUCTS, SAID ALKYLENE OXIDE POLYFROM 2 TO 4 CARBON ATOMSAND SAID ALKYLENE OXIDE POLYMER HAVING A MOLECULAR WEIGHT OF AT LEAST 300, SAID PHOTOGRAPHIC SILVER HALIDE EMULSION CONTAINING 5-CARBOXY-4HYDROXY-1,3,3A,7-TETRAZAINDENE AS A FOG INHIBITING AGENT.
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) | 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 |