US3684514A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Light-sensitive silver halide color photographic emulsions
Assignee: Konica Minolta Inc
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Filing: 1970-02-03
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Granted: 1972-08-15
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Expires: 1990-02-03
Abstract
Abstract A NEW COMPOUND OF THE GENERAL FORMULA 1-((X)N-PHENYL),3-((2,5-DI(O=),3-R-PYRROLIDIN-1-YL)-(Y- PHENYLENE)-A-),4-Z,5-(O=)-2-PYRAZOLINE WHEREIN: R IS AN ALKYL GROUP HAVING 8-18 CARBON ATOMS OR AN ALKENYL GROUP, A IS -NHCO-OR-NH-, X IS A HALOGEN ATOM OR A METHYL ALKOXY, ARLOXY OR ALKOXYCARBONYL GROUP. N IS A INTEGER OF 1 TO3, Y IS A HYDROGEN OR HALOGEN ATOM AND Z IS A HYDROGEN ATOM OR AN ARYLAZO GROUP IS FOUND TO BE USEFUL AS A MAGENTA-FORMING COLOR COUPLER FOR LIGHT-SENSITIVE SILVER HALIDE EMULSIONS IN COLOR PHOTOGRAPHY. THE COUPLER SHOWS GOOD SOLUBILITY IN HIGH BOILING SOLVENT AND FORMS A DYE IMAGE HAVING SUITABLE ABSORPTION FOR COLOR PHOTOGRAPHY.
Inventors
- 👤 Masakuni Iwama
- 👤 Isaburo Inoue
- 👤 Mitsuto Fujiwara
- 👤 Teruo Hanzawa
- 👤 Tamotsu Kojima
- 👤 Toshihiko Yamamoto
- 👤 Takaya Endo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 02:03
CPC Classifications
G; G03; G03C; G03C7/00; G03C7/30; G03C7/32; G03C7/36; G03C7/38; G03C7/384
Claims Analysis
Total Claims: 0
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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) | 1975-08-15 | 1976-02-14 | 1976-08-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-08-15 | 1980-02-14 | 1980-08-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-08-15 | 1984-02-14 | 1984-08-15 | $7700.00 | Window Closed / Lapsed |