US2884326A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Leuco phthalocyanine and diazo compound in photographic element
Assignee: EIDP Inc
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Filing: 1955-04-06
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Granted: 1959-04-28
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Expires: 1975-04-06
Abstract
No abstract record available.
Inventors
- 👤 Zemp Rene Robert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 09:52
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/52; G03C1/61
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
110 words
A PHOTOGRAPHIC ELEMENT COMPRISING A SHEET SUPPORT HAVING A LAYER CONTAINING (1) AN ETHANOL-SOLUBLE PHTHALOCYANINE COMPLEX TAKEN FROM THE GROUP CONSISTING OF (A) SUCH A COMPLEX HAVING THE EMPIRICAL FORMULA M(C8H4N2)LNH IN WHICH EACH OF THE SIX C8H4N2 GROUPS REPRESENTS ONE PHTHALONITRILE UNIT, FOUR OF WHICH ARE JOINED TO THE CENTRAL BIVALENT METAL M TAKEN FROM THE GROUP CONSISTING OF CU AND NI AND FORM A METAL PHTHALOCYANINE MOLECULE, THE TWO EXTRA PHTHALONITRILE UNITS AND THE EXTRA NH GROUP REPRESENTING A WING (C8H4N)2NH SAID COMPLEX BEING FURTHER CHARACTERIZED BY YIELDING THE CORRESPONDING METAL PHTHALOCYANINE,A PHTHALONITRILE AND AMMONIA BEING TREATED WITH REDUCING AGENTS, (B) SUCH A COMPLEX REPRESENTD BY THE FORMULA:
Claim 2
Dependent Claim
110 words
A PHOTOGRAPHIC ELEMENT COMPRISING A SHEET SUPPORT HAVING A LAYER CONTAINING (1) AN ETHANOL-SOLUBLE PHTHALOCYANINE COMPLEX TAKEN FROM THE GROUP CONSISTING OF (A) SUCH A COMPLEX HAVING THE EMPIRICAL FORMULA M(C8H4N2)LNH IN WHICH EACH OF THE SIX C8H4N2 GROUPS REPRESENTS ONE PHTHALONITRILE UNIT, FOUR OF WHICH ARE JOINED TO THE CENTRAL BIVALENT METAL M TAKEN FROM THE GROUP CONSISTING OF CU AND NI AND FORM A METAL PHTHALOCYANINE MOLECULE, THE TWO EXTRA PHTHALONITRILE UNITS AND THE EXTRA NH GROUP REPRESENTING A WING (C8H4N)2NH SAID COMPLEX BEING FURTHER CHARACTERIZED BY YIELDING THE CORRESPONDING METAL PHTHALOCYANINE,A PHTHALONITRILE AND AMMONIA BEING TREATED WITH REDUCING AGENTS, (B) SUCH A COMPLEX REPRESENTD BY THE FORMULA:
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) | 1962-04-27 | 1962-10-27 | 1963-04-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-04-27 | 1966-10-27 | 1967-04-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-04-27 | 1970-10-27 | 1971-04-28 | $7700.00 | Window Closed / Lapsed |