Patent US2772285A successfully refreshed from Google Patents.
US2772285A
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Process for producing copper-phthalocyanine precursor
Assignee: EIDP Inc
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Filing: 1953-01-21
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Granted: 1956-11-27
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Expires: 1973-01-21
Abstract
No abstract record available.
Inventors
- 👤 Robert A Brooks
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 19:17
CPC Classifications
C; C09; C09B; C09B47/00; C09B47/04; C09B47/06; C09B47/073
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
81 words
A PROCESS FOR PRODUCING A COPPER PHTHALOCYANINE PRECURSOR, WHICH COMPRISES REACTING A COMPOUND OF THE GROUP CONSISTING OF 1,3-DIIMINO-ISOINDOLINE AND ITS 4,5BENZO ANOLOG WITH A CUPRIC SALT IN AN INERT ORGANIC SOLVENT, AT A TEMPERATURE BETWEEN 55* C. AND 95* C. AND IN THE ABSENCE OF ADDED AMMONIA, THE QUANTITIES OF SAID REACTANTS BEING ESSENTIALLY IN THE PROPORTION OF 6 MOLES OF THE DIIMINO-ISOINDOLINE COMPOUND TO 1 MOLE OF CUPRIC SALT, AND RECOVERING THE REACTION PRODUCT BY DILUTION OF THE SOLVENT.
Claim 2
Dependent Claim
81 words
A PROCESS FOR PRODUCING A COPPER PHTHALOCYANINE PRECURSOR, WHICH COMPRISES REACTING A COMPOUND OF THE GROUP CONSISTING OF 1,3-DIIMINO-ISOINDOLINE AND ITS 4,5BENZO ANOLOG WITH A CUPRIC SALT IN AN INERT ORGANIC SOLVENT, AT A TEMPERATURE BETWEEN 55* C. AND 95* C. AND IN THE ABSENCE OF ADDED AMMONIA, THE QUANTITIES OF SAID REACTANTS BEING ESSENTIALLY IN THE PROPORTION OF 6 MOLES OF THE DIIMINO-ISOINDOLINE COMPOUND TO 1 MOLE OF CUPRIC SALT, AND RECOVERING THE REACTION PRODUCT BY DILUTION OF THE SOLVENT.
References Cited (Backward Citations)
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Cited
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US2302612A
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US2318787A
Cited
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Cited
GB698049A
Cited
US2683643A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-11-27 | 1960-05-28 | 1960-11-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-11-27 | 1964-05-28 | 1964-11-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-11-27 | 1968-05-28 | 1968-11-27 | $7700.00 | Window Closed / Lapsed |