Patent US2772283A successfully refreshed from Google Patents.
US2772283A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of copper phthalocyanine precursor
Assignee: EIDP Inc
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Filing: 1953-10-05
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Granted: 1956-11-27
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Expires: 1973-10-05
Abstract
No abstract record available.
Inventors
- 👤 Arthur C Stevenson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 18:03
CPC Classifications
C; C09; C09B; C09B47/00; C09B47/04; C09B47/06; C09B47/067
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
105 words
A PROCESS OF PRODUCING AN ALCOHOL-SOLUBLE COMPLEX COMPOUND ADAPTED TO YIELD COPPER PHTHALOCYANINE UPON BEING TREATED WITH REDUCING AGENTS AND HAVING A CONSTITUTION CORRESPONDING TO THE CU(C8H4N2)6NH, WHICH COMPRISES HEATING, AT A TEMPERATURE NOT EXCEEDING 98* C., A REACTION MASS COMPRISING PHTHALONITRILE, AMMONIA, A CUPRIC SALT, A WATER-SOLUBLE ORGANIC SOLVENT SELECTED FROM THE GROUP CONSISTING OF DIMETHYLFORMAMIDE, DIMETHYLACETAMIDE, THE LOWER ALKYL MONOETHERS OF ETHYLENE GLYCOL AND THE LOWER ALKYL MONOETHERS OF DIETHYLENE GLYCOL, AND AN ASSISTANT SELECTED FROM THE GROUP CONSISTING OF GUANIDINE, METHYL GLUCAMINE, IMINO-PHTHALIMIDINE AND 1,3-DIIMINOISOINDOLINE, AND CONTACTING THE REACTION MASS WITH OXYGEN IN GASEOUS FORM SUBSTANTIALLY THROUGHOUT THE PERIOD OF OBSERVABLE REACTION.
Claim 2
Dependent Claim
105 words
A PROCESS OF PRODUCING AN ALCOHOL-SOLUBLE COMPLEX COMPOUND ADAPTED TO YIELD COPPER PHTHALOCYANINE UPON BEING TREATED WITH REDUCING AGENTS AND HAVING A CONSTITUTION CORRESPONDING TO THE CU(C8H4N2)6NH, WHICH COMPRISES HEATING, AT A TEMPERATURE NOT EXCEEDING 98* C., A REACTION MASS COMPRISING PHTHALONITRILE, AMMONIA, A CUPRIC SALT, A WATER-SOLUBLE ORGANIC SOLVENT SELECTED FROM THE GROUP CONSISTING OF DIMETHYLFORMAMIDE, DIMETHYLACETAMIDE, THE LOWER ALKYL MONOETHERS OF ETHYLENE GLYCOL AND THE LOWER ALKYL MONOETHERS OF DIETHYLENE GLYCOL, AND AN ASSISTANT SELECTED FROM THE GROUP CONSISTING OF GUANIDINE, METHYL GLUCAMINE, IMINO-PHTHALIMIDINE AND 1,3-DIIMINOISOINDOLINE, AND CONTACTING THE REACTION MASS WITH OXYGEN IN GASEOUS FORM SUBSTANTIALLY THROUGHOUT THE PERIOD OF OBSERVABLE REACTION.
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US2302612A
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US2727043A
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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) | 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 |