Patent US2698795A successfully refreshed from Google Patents.
US2698795A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sulfamyl couplers in mixed packet photographic emulsions
Assignee: Eastman Kodak Co
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Filing: 1953-03-26
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Granted: 1955-01-04
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Expires: 1973-03-26
Abstract
No abstract record available.
Inventors
- 👤 Homer W J Cressman
- 👤 Scheuring S Fierke
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 17:52
CPC Classifications
G; G03; G03C; G03C7/00; G03C7/30; G03C7/32; G03C7/3212; G03C7/388; G03C7/3882
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
158 words
THE METHOD OF MAKING A PACKET OF PHOTOGRAPHIC EMULSION WHICH COMPRISES FORMING A MIXTURE OF (1) A NONDIFFUSING COLOR-FORMING COMPOUND CAPABLE OF REACTING WITH THE OXIDATION PRODUCT OF PRIMARY AROMATIC AMINO DEVELOPING AGENT ON PHOTOGRAPHIC DEVELOPMENT AND CONTAINING A GROUP SELECTED FROM THE CLASS CONSISTING OF SULFAMYLBENZAMIDO, DISULFAMYLBENZAMIDO, ALKYLSULFAMYLBENZAMIDO, DIALKYLSULFAMYLBENZAMIDO, AMINOALKYLSULFAMYLBENZAMIDO, DIAMINOALKYLSULFAMYLBENZAMIDO, HYDROXYALKYLSULFAMYLBENZAMIDO, DIHYDROXYALKYLSULFAMYLBENZAMIDO, PHENYLALKYLSULFAMYLBENZAMIDO, AND DIPHENYLALKYLSULFAMYLBENZAMIDO GROUPS, (2) A GELATINO-SILVER HALIDE EMULSION AND (3) A WATER SALT OF A POLYMER SELECTED FROM THE CLASS CONSISTING OF METHACRYLIC ACIDMETHYL-A-METHACRYLATE COPOLYMER, ALGIN, CARBOXYMETHYL CELLULOSE AND CELLULOSE SULFATE, SAID COUPLER BEING ADDED TO ONE OF SAID OTHER INGREDIENTS BEFORE THE THIRD INGREDIENT IS ADDED BRINGING THE PH OF THE MIXTURE BELOW 7 IMMEDIATELY AFTER ADDING SAID WATER-SOLUBLE SALT, AND ADDING TO THE MIXTURE WITH STIRRING A SOLUTION OF A POLYMERIC CARBON CHAIN COMPOUND HAVING RECURRING PHENYL GROUPS, CARBOXYLIC ACID GROUPS AND AMIDE GROUPS TO FORM A DISPERSION OF PARTICLES OF GELATIN, PACKET-FORMING COMPONENT AND SILVER HALIDE, CONTAINING SAID COLOR-FORMING COMPOUND.
Claim 2
Independent Claim
158 words
THE METHOD OF MAKING A PACKET OF PHOTOGRAPHIC EMULSION WHICH COMPRISES FORMING A MIXTURE OF (1) A NONDIFFUSING COLOR-FORMING COMPOUND CAPABLE OF REACTING WITH THE OXIDATION PRODUCT OF PRIMARY AROMATIC AMINO DEVELOPING AGENT ON PHOTOGRAPHIC DEVELOPMENT AND CONTAINING A GROUP SELECTED FROM THE CLASS CONSISTING OF SULFAMYLBENZAMIDO, DISULFAMYLBENZAMIDO, ALKYLSULFAMYLBENZAMIDO, DIALKYLSULFAMYLBENZAMIDO, AMINOALKYLSULFAMYLBENZAMIDO, DIAMINOALKYLSULFAMYLBENZAMIDO, HYDROXYALKYLSULFAMYLBENZAMIDO, DIHYDROXYALKYLSULFAMYLBENZAMIDO, PHENYLALKYLSULFAMYLBENZAMIDO, AND DIPHENYLALKYLSULFAMYLBENZAMIDO GROUPS, (2) A GELATINO-SILVER HALIDE EMULSION AND (3) A WATER SALT OF A POLYMER SELECTED FROM THE CLASS CONSISTING OF METHACRYLIC ACIDMETHYL-A-METHACRYLATE COPOLYMER, ALGIN, CARBOXYMETHYL CELLULOSE AND CELLULOSE SULFATE, SAID COUPLER BEING ADDED TO ONE OF SAID OTHER INGREDIENTS BEFORE THE THIRD INGREDIENT IS ADDED BRINGING THE PH OF THE MIXTURE BELOW 7 IMMEDIATELY AFTER ADDING SAID WATER-SOLUBLE SALT, AND ADDING TO THE MIXTURE WITH STIRRING A SOLUTION OF A POLYMERIC CARBON CHAIN COMPOUND HAVING RECURRING PHENYL GROUPS, CARBOXYLIC ACID GROUPS AND AMIDE GROUPS TO FORM A DISPERSION OF PARTICLES OF GELATIN, PACKET-FORMING COMPONENT AND SILVER HALIDE, CONTAINING SAID COLOR-FORMING COMPOUND.
References Cited (Backward Citations)
FR878094A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-01-03 | 1958-07-05 | 1959-01-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-01-03 | 1962-07-05 | 1963-01-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-01-03 | 1966-07-05 | 1967-01-04 | $7700.00 | Window Closed / Lapsed |