Patent US2465324A successfully refreshed from Google Patents.
Patent US3050394A successfully refreshed from Google Patents.
US3050394A
Expired / Lapsed
US
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Method of incorporating color couplers in hydrophlic colloids
Assignee: GAF Chemicals Corp
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Filing: 1959-09-30
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Granted: 1962-08-21
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Expires: 1979-09-30
Abstract
No abstract record available.
Inventors
- 👤 Ben-Ezra Aaron
- 👤 Chester E Rose
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 05:35
CPC Classifications
C; C07; C07D; C07D235/00; C07D235/02; C07D235/04; C07D235/18; G; G03; G03C; G03C7/00; G03C7/30; G03C7/32; G03C7/3212; G03C7/388
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
177 words
THE METHOD OF INCORPORATING IN A LIGHT SENSITIVE GELATIN SILVER HALIDE EMULSION, 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 CLASS 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 WHICH 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 AN ALIPHATIC HYDROCARBON RADICAL CONTAINING AT LEAST 10 CARBON ATOMS AND SUBSTITUTED IN THE BENZENE PORTION BY A WATER SOLUBILIZING GROUP WHICH COMPRISES DISSOLVING SAID COLOR FORMER IN DIMETHYL SULFOXIDE, DILTUING THE RESULTANT SOLUTION WITH AN AQUEOUS SOLUTION CONTAINING A SURFACE ACTIVE AGENT AND THEN ADDING THE RESULTANT DISPERSION TO THE LIQUID GELATIN SILVER-HALIDE EMULSION PRIOR TO COATING IT UPON A SUITABLE SUPPORT.
Claim 2
Independent Claim
177 words
THE METHOD OF INCORPORATING IN A LIGHT SENSITIVE GELATIN SILVER HALIDE EMULSION, 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 CLASS 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 WHICH 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 AN ALIPHATIC HYDROCARBON RADICAL CONTAINING AT LEAST 10 CARBON ATOMS AND SUBSTITUTED IN THE BENZENE PORTION BY A WATER SOLUBILIZING GROUP WHICH COMPRISES DISSOLVING SAID COLOR FORMER IN DIMETHYL SULFOXIDE, DILTUING THE RESULTANT SOLUTION WITH AN AQUEOUS SOLUTION CONTAINING A SURFACE ACTIVE AGENT AND THEN ADDING THE RESULTANT DISPERSION TO THE LIQUID GELATIN SILVER-HALIDE EMULSION PRIOR TO COATING IT UPON A SUITABLE SUPPORT.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-08-20 | 1966-02-19 | 1966-08-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-08-20 | 1970-02-19 | 1970-08-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-08-20 | 1974-02-19 | 1974-08-21 | $7700.00 | Window Closed / Lapsed |