US2605183A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heterocyclic alkylamines as accelerators for photographic developers
Assignee: GAF Chemicals Corp
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Filing: 1949-11-16
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Granted: 1952-07-29
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Expires: 1969-11-16
Abstract
No abstract record available.
Inventors
- 👤 Ivy V Runyan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 15:58
CPC Classifications
G; G03; G03C; G03C5/00; G03C5/26; G03C5/29; G03C5/305
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
129 words
AN ALKALINE PHOTOGRAPHIC DEVELOPER FOR SILVER HALIDE EMULSIONS COMPRISING AN AROMATIC SILVER HALIDE DEVELOPING AGENT AND A NUCLEAR AMINOALKYL SUSBTITUTED HETEROCYCLIC COMPOUND, THE NUCLEUS OF WHICH IS SELECTED FROM THE GROUP CONSISTING OF ONE- TO 6-MEMBERED RING AND TWO 5TO 6-MEMBERED RINGS FUSED TO EACH OTHER ONE OF SAID RINGS CONTAINING FROM 1 TO 2 HETERO ATOMS OF WHICH ONE IS A MEMBER OF THE GROUP CONSISTING OF N, O AND S AND THE OTHERIS NITROGEN, THE REMAINING MEMBERS OF THE NUCLEAR BEING CARBON ATOMS AND THE REMAINING NUCLEAR SUBSTITUENTS BEING SELECTED FROM THE CLASS CONSISTING OF HYDROGEN, KETO-OXYGEN, UNSUBSTITUTED LOWER ALKYL AND UNSUBSTITUTED MONOCYCLIC ARYL HYDROCARBON GROUPS, AND THE NUCLEAR AMINOALKYL SUBSTITUTENT GROUP OF WHICH CONTAINS NOT MORE THAN 3 CARBON ATOMS, AND THE SALTS OF SAID AMINES.
Claim 2
Dependent Claim
129 words
AN ALKALINE PHOTOGRAPHIC DEVELOPER FOR SILVER HALIDE EMULSIONS COMPRISING AN AROMATIC SILVER HALIDE DEVELOPING AGENT AND A NUCLEAR AMINOALKYL SUSBTITUTED HETEROCYCLIC COMPOUND, THE NUCLEUS OF WHICH IS SELECTED FROM THE GROUP CONSISTING OF ONE- TO 6-MEMBERED RING AND TWO 5TO 6-MEMBERED RINGS FUSED TO EACH OTHER ONE OF SAID RINGS CONTAINING FROM 1 TO 2 HETERO ATOMS OF WHICH ONE IS A MEMBER OF THE GROUP CONSISTING OF N, O AND S AND THE OTHERIS NITROGEN, THE REMAINING MEMBERS OF THE NUCLEAR BEING CARBON ATOMS AND THE REMAINING NUCLEAR SUBSTITUENTS BEING SELECTED FROM THE CLASS CONSISTING OF HYDROGEN, KETO-OXYGEN, UNSUBSTITUTED LOWER ALKYL AND UNSUBSTITUTED MONOCYCLIC ARYL HYDROCARBON GROUPS, AND THE NUCLEAR AMINOALKYL SUBSTITUTENT GROUP OF WHICH CONTAINS NOT MORE THAN 3 CARBON ATOMS, AND THE SALTS OF SAID AMINES.
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) | 1955-07-29 | 1956-01-28 | 1956-07-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-07-29 | 1960-01-28 | 1960-07-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-07-29 | 1964-01-28 | 1964-07-29 | $7700.00 | Window Closed / Lapsed |