Patent US2768894A successfully refreshed from Google Patents.
US2768894A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photographic element with emulsion layer containing color former and wetting agent
Assignee: GAF Chemicals Corp
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Filing: 1954-04-30
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Granted: 1956-10-30
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Expires: 1974-04-30
Abstract
No abstract record available.
Inventors
- 👤 Benjamin R Harriman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 09:52
CPC Classifications
G; G03; G03C; G03C7/00; G03C7/30; G03C7/3003; G03C1/00; G03C1/005; G03C1/06; G03C1/38; G03C7/32; G03C7/3212; G03C7/388
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
155 words
A PHOTOGRAPIC ELEMENT COMPRISING A LIGHT SENSITIVE GELATINO SILVER HALIDE LAYER CONTAINING A COLOR FORMER FAST TO DIFFUSION AND CAPABLE OF FORMING, UPON COLOR DEVELOPMENT WITH A PRIMARY AROMATIC AMINO DEVELOPING AGENT, A DYE IMAGE SELECTED FROM THE GLASS CONSISTING OF AZOMETHINE, INDOANILINE AND PHENAZONIUM DYE IMAGES, SAID COLOR FORMER CONTAINING A BENZIMIDAZOLE NUCLEUS CONNECTED THROUGH ITS CARBON ATOMS IN THE 2-POSITION TO THE RESIDUE OF THE COLOR FORMING MOLECULE WHICH IS REACTIVE WITH THE OXIDATION PRODUCT OF A PRIMARY DEVELOPING AGENT AND CONTAINS A REACTIVE GROUP SELECTED FROM THE CLASS CONSISTING OF A REACTIVE METHYLENE, ETHENOL AND PHENOLIC HYDROXY GROUP, SAID BENZIMIDAZOLE NUCLEUS BEING SUBSTITUTED ON ONE OF THE NITROGEN ATOMS BY A LONG CHAIN ALIPHATIC GROUP AND SUBSTITUTED IN THE BENZENE PORTION BY A WATER SOLUBILIZING GROUP, SAID EMULSION CONTAINING AS A SURFACE ACTIVE AGENT, THE NON-IONIC REACTION PRODUCT OF A BRANCHED-CHAIN MONOHYDRIC ALCOHOL AND ETHYLENE OXIDE CHARACTERIZED BY THE FOLLOWING GENERAL FORMULA:
Claim 2
Dependent Claim
155 words
A PHOTOGRAPIC ELEMENT COMPRISING A LIGHT SENSITIVE GELATINO SILVER HALIDE LAYER CONTAINING A COLOR FORMER FAST TO DIFFUSION AND CAPABLE OF FORMING, UPON COLOR DEVELOPMENT WITH A PRIMARY AROMATIC AMINO DEVELOPING AGENT, A DYE IMAGE SELECTED FROM THE GLASS CONSISTING OF AZOMETHINE, INDOANILINE AND PHENAZONIUM DYE IMAGES, SAID COLOR FORMER CONTAINING A BENZIMIDAZOLE NUCLEUS CONNECTED THROUGH ITS CARBON ATOMS IN THE 2-POSITION TO THE RESIDUE OF THE COLOR FORMING MOLECULE WHICH IS REACTIVE WITH THE OXIDATION PRODUCT OF A PRIMARY DEVELOPING AGENT AND CONTAINS A REACTIVE GROUP SELECTED FROM THE CLASS CONSISTING OF A REACTIVE METHYLENE, ETHENOL AND PHENOLIC HYDROXY GROUP, SAID BENZIMIDAZOLE NUCLEUS BEING SUBSTITUTED ON ONE OF THE NITROGEN ATOMS BY A LONG CHAIN ALIPHATIC GROUP AND SUBSTITUTED IN THE BENZENE PORTION BY A WATER SOLUBILIZING GROUP, SAID EMULSION CONTAINING AS A SURFACE ACTIVE AGENT, THE NON-IONIC REACTION PRODUCT OF A BRANCHED-CHAIN MONOHYDRIC ALCOHOL AND ETHYLENE OXIDE CHARACTERIZED BY THE FOLLOWING GENERAL FORMULA:
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-10-30 | 1960-04-30 | 1960-10-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-10-30 | 1964-04-30 | 1964-10-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-10-30 | 1968-04-30 | 1968-10-30 | $7700.00 | Window Closed / Lapsed |