US2782207A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of copper-phthalocyanine precursor
Assignee: EIDP Inc
•
Filing: 1954-05-17
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Granted: 1957-02-19
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Expires: 1974-05-17
Abstract
No abstract record available.
Inventors
- 👤 Melvin A Perkins
- 👤 Mayron S Whelen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 00:32
CPC Classifications
C; C09; C09B; C09B47/00; C09B47/04; C09B47/06; C09B47/067
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
49 words
IN THE PROCESS OF PRODUCING COPPER PHTHALOCYANINE PRECURSOR BY HEATING TOGETHER, AT A TEMPERATURE NOT EXCEEDING 95*C., PHTHALONITRILE, A COPPER SALT AND AMMONILA IN AN ORGANIC SOLVENT, THE IMPROVEMENT WHICH CONSISTS OF EFFECTING THE REACTION, IN THE PRESENCE OF A NON-GASEOUS OXIDIZING AGENT WHICH IS INERT TOWARD THE SOLVENT.
Claim 2
Dependent Claim
49 words
IN THE PROCESS OF PRODUCING COPPER PHTHALOCYANINE PRECURSOR BY HEATING TOGETHER, AT A TEMPERATURE NOT EXCEEDING 95*C., PHTHALONITRILE, A COPPER SALT AND AMMONILA IN AN ORGANIC SOLVENT, THE IMPROVEMENT WHICH CONSISTS OF EFFECTING THE REACTION, IN THE PRESENCE OF A NON-GASEOUS OXIDIZING AGENT WHICH IS INERT TOWARD THE SOLVENT.
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) | 1960-02-19 | 1960-08-20 | 1961-02-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-02-19 | 1964-08-20 | 1965-02-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-02-19 | 1968-08-20 | 1969-02-19 | $7700.00 | Window Closed / Lapsed |