Patent US6240113B1 successfully refreshed from Google Patents.
US2600788A
Expired / Lapsed
US
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Halogen-substituted pyrazolone couplers for color photography
Assignee: Eastman Kodak Co
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Filing: 1949-06-07
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Granted: 1952-06-17
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Expires: 1969-06-07
Abstract
No abstract record available.
Inventors
- 👤 Loria Anthony
- 👤 Paul W Vittum
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 13:15
CPC Classifications
C; C07; C07D; C07D231/00; C07D231/02; C07D231/10; C07D231/14; C07D231/44; C07D231/52; G; G03; G03C; G03C7/00; G03C7/30; G03C7/32; G03C7/36; G03C7/38; G03C7/384
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
46 words
THE METHODE OF PRODUCING A MAGENTACOLORED IMAGE IN. A SILVER HALIDE EMULSION LAYER WHICH COMPRISES EXPOSING SAID LAYER AND DEVELOPING IT WITH A PRIMARY AROMATIC AMINO DEVELOPING AGENT IN THE PRESENCE OF A 1-PHENYL-3ACYLAMINO-5-PYRAZOLONE COUPLER COMPOUND HAVING AT LEAST TWO HALOGEN SUBSTITUENTS ON THE 1PHENYL RADICAL.
Claim 2
Dependent Claim
46 words
THE METHODE OF PRODUCING A MAGENTACOLORED IMAGE IN. A SILVER HALIDE EMULSION LAYER WHICH COMPRISES EXPOSING SAID LAYER AND DEVELOPING IT WITH A PRIMARY AROMATIC AMINO DEVELOPING AGENT IN THE PRESENCE OF A 1-PHENYL-3ACYLAMINO-5-PYRAZOLONE COUPLER COMPOUND HAVING AT LEAST TWO HALOGEN SUBSTITUENTS ON THE 1PHENYL RADICAL.
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) | 1955-06-17 | 1955-12-17 | 1956-06-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-06-17 | 1959-12-17 | 1960-06-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-06-17 | 1963-12-17 | 1964-06-17 | $7700.00 | Window Closed / Lapsed |