Patent US3062645A successfully refreshed from Google Patents.
US3062645A
Expired / Lapsed
US
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Sensitization of photographic emulsions to be developed with p-phenylenediamine developing agents
Assignee: Eastman Kodak Co
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Filing: 1957-11-27
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Granted: 1962-11-06
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Expires: 1977-11-27
Abstract
No abstract record available.
Inventors
- 👤 Burt H Carroll
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 18:59
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/005; G03C1/06; G03C1/08; G03C1/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
81 words
A LIGHT-SENSITIVE SILVER HALIDE EMULSION SENSITIZED WITH A BIS-QUATERNARY AMMONIUM SALT A QUATERNARY AMMONIUM SALT GROUP OF WHICH IS LINKED THROUGH ITS QUATERNARY NITROGEN ATOM DIRECTLY TO THE QUATERNARY NITROGEN ATOM OF THE OTHER QUATERNARY AMMONIUM SALT GROUP, BY A LINEAR CHAIN OF AT LEAST FOUR ATOMS, SAID EMULSION CONTAINING A COUPLER COMPOUND OF THE CLASS CONSISTING OF PHENOLIC AND 5-PYRAZOLONE COUPLER COMPOUNDS CAPABLE OF COUPLING WITH THE OXIDATION PRODUCT OF A P-PHENYLENEDIAMINE SILVER HALIDE DEVELOPING AGENT TO FORM A DYE.
Claim 2
Dependent Claim
81 words
A LIGHT-SENSITIVE SILVER HALIDE EMULSION SENSITIZED WITH A BIS-QUATERNARY AMMONIUM SALT A QUATERNARY AMMONIUM SALT GROUP OF WHICH IS LINKED THROUGH ITS QUATERNARY NITROGEN ATOM DIRECTLY TO THE QUATERNARY NITROGEN ATOM OF THE OTHER QUATERNARY AMMONIUM SALT GROUP, BY A LINEAR CHAIN OF AT LEAST FOUR ATOMS, SAID EMULSION CONTAINING A COUPLER COMPOUND OF THE CLASS CONSISTING OF PHENOLIC AND 5-PYRAZOLONE COUPLER COMPOUNDS CAPABLE OF COUPLING WITH THE OXIDATION PRODUCT OF A P-PHENYLENEDIAMINE SILVER HALIDE DEVELOPING AGENT TO FORM A DYE.
References Cited (Backward Citations)
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US2414208A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-11-05 | 1966-05-07 | 1966-11-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-11-05 | 1970-05-07 | 1970-11-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-11-05 | 1974-05-07 | 1974-11-06 | $7700.00 | Window Closed / Lapsed |