US2801171A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photographic color former dispersions
Assignee: Eastman Kodak Co
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Filing: 1954-12-20
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Granted: 1957-07-30
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Expires: 1974-12-20
Abstract
No abstract record available.
Inventors
- 👤 Scheuring S Fierke
- 👤 Chechak Jonas John
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:58
CPC Classifications
G; G03; G03C; G03C7/00; G03C7/30; G03C7/388
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
126 words
THE METHOD OF INCORPORATING A COLOR FORMER IN A GELATINO-SILVER HALIDE EMULSION WHICH COMPRISES DISSOLVING A COLOR-FORMING COMPOUND CAPABLE OF REACTING WITH A PRIMARY AROMATIC AMINO DEVELOPING AGENT ON PHOTOGRAPHIC DEVELOPMENT, IN A SOLVENT INCLUDING AT LEAST A SOLVENT SELECTED FROM THE CLASS CONSISTING OF WATER-SOLUBLE ORGANIC SOLVENTS FOR THE COLOR-FORMING COMPOUND HAVING A SOLUBILITY OF AT LEAST 2 PARTS OF SOLVENT IN 100 PARTS OF WATER AND A BOILING POINT ABOVE 125* C., AND LOW-BOILING WATER-INSOLUBLE ORGANIC SOLVENTS FOR THE COLOR-FORMING COMPOUND HAVING A BOILING POINT BELOW ABOUT 125* C. AND A SOLUBILITY OF FROM .80 TO 33 PARTS OF SOLVENT IN 100 PARTS OF WATER, AND LESS THAN ABOUT ONE PART PER PART OF COLOR-FORMING COMPOUND OF A SUBSTANTIALLY WATER-INSOLUBLE, LOW MOLECULAR WEIGHT, ORGANIC
Claim 2
Independent Claim
126 words
THE METHOD OF INCORPORATING A COLOR FORMER IN A GELATINO-SILVER HALIDE EMULSION WHICH COMPRISES DISSOLVING A COLOR-FORMING COMPOUND CAPABLE OF REACTING WITH A PRIMARY AROMATIC AMINO DEVELOPING AGENT ON PHOTOGRAPHIC DEVELOPMENT, IN A SOLVENT INCLUDING AT LEAST A SOLVENT SELECTED FROM THE CLASS CONSISTING OF WATER-SOLUBLE ORGANIC SOLVENTS FOR THE COLOR-FORMING COMPOUND HAVING A SOLUBILITY OF AT LEAST 2 PARTS OF SOLVENT IN 100 PARTS OF WATER AND A BOILING POINT ABOVE 125* C., AND LOW-BOILING WATER-INSOLUBLE ORGANIC SOLVENTS FOR THE COLOR-FORMING COMPOUND HAVING A BOILING POINT BELOW ABOUT 125* C. AND A SOLUBILITY OF FROM .80 TO 33 PARTS OF SOLVENT IN 100 PARTS OF WATER, AND LESS THAN ABOUT ONE PART PER PART OF COLOR-FORMING COMPOUND OF A SUBSTANTIALLY WATER-INSOLUBLE, LOW MOLECULAR WEIGHT, ORGANIC
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) | 1960-07-29 | 1961-01-28 | 1961-07-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-07-29 | 1965-01-28 | 1965-07-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-07-29 | 1969-01-28 | 1969-07-30 | $7700.00 | Window Closed / Lapsed |