US3074958A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for preparing metal phthalocyanines
Assignee: Honeywell International Inc
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Filing: 1960-12-02
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Granted: 1963-01-22
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Expires: 1980-12-02
Abstract
No abstract record available.
Inventors
- 👤 Maurice H Fleysher
- 👤 Walter B Richards
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:46
CPC Classifications
C; C09; C09B; C09B47/00; C09B47/04; C09B47/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
102 words
IN A PROCESS FOR PREPARING A METAL PHTHALOCYANINE BY HEATING A REACTION MIXTURE CONTAINING (1) A PHTHALOCYANINE INTERMEDIATE FROM THE GROUP CONSISTING OF PHTHALIC ANHYDRIDE, PHTHALIC ACID, PHTHALIC ACID ESTERS PHTHALIC ACID SALTS, PHTHALODIAMIDE, PHTHALIMIDE AND MIXTURES THEREOF; (2) A NITROGEN DONOR FROM THE GROUP CONSISTING OF UREA, BIURET, GUANIDINE, GUANIDYL-UREA, DICYANDIAMIDE, AND CYANURIC ACID; AND (3) A METAL DONOR, THE IMPROVEMENT WHICH COMPRISES INCORPORATING AMMONIUM CHLORIDE IN THE REACTION MIXTURE IN AMOUNT AT LEAST SUFFICIENT TO IMPROVE THE YIELD OF THE METAL PHTHALOCYANINE FROM THE REACTION MIXTURE AS COMPARED WITH THE YIELD OBTAINED FROM THE REACTION MIXTURE WITHOUT THE AMMONIUM CHLORIDE.
Claim 2
Dependent Claim
102 words
IN A PROCESS FOR PREPARING A METAL PHTHALOCYANINE BY HEATING A REACTION MIXTURE CONTAINING (1) A PHTHALOCYANINE INTERMEDIATE FROM THE GROUP CONSISTING OF PHTHALIC ANHYDRIDE, PHTHALIC ACID, PHTHALIC ACID ESTERS PHTHALIC ACID SALTS, PHTHALODIAMIDE, PHTHALIMIDE AND MIXTURES THEREOF; (2) A NITROGEN DONOR FROM THE GROUP CONSISTING OF UREA, BIURET, GUANIDINE, GUANIDYL-UREA, DICYANDIAMIDE, AND CYANURIC ACID; AND (3) A METAL DONOR, THE IMPROVEMENT WHICH COMPRISES INCORPORATING AMMONIUM CHLORIDE IN THE REACTION MIXTURE IN AMOUNT AT LEAST SUFFICIENT TO IMPROVE THE YIELD OF THE METAL PHTHALOCYANINE FROM THE REACTION MIXTURE AS COMPARED WITH THE YIELD OBTAINED FROM THE REACTION MIXTURE WITHOUT THE AMMONIUM CHLORIDE.
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) | 1966-01-21 | 1966-07-23 | 1967-01-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-01-21 | 1970-07-23 | 1971-01-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-01-21 | 1974-07-23 | 1975-01-22 | $7700.00 | Window Closed / Lapsed |