US2618642A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for producing noncrystallizing copper phthalocyanine
Assignee: GAF Chemicals Corp
•
Filing: 1950-10-05
•
Granted: 1952-11-18
•
Expires: 1970-10-05
Abstract
No abstract record available.
Inventors
- 👤 Jacob L Keller
- 👤 Lawrence D Lytle
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 23:59
CPC Classifications
C; C09; C09B; C09B67/00; C09B67/0032
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
57 words
A PROCESS FOR THE PRODUCTION OF A NON-CRYSTALLIZING, NON-FLOCCULATING, COPPER PHTHALOCYANINE WHICH COMPRISES CHARGING COPPER PHTHALOCYANINE INTO TRICHLORBENZENE, REMOVING ALL WATER, ADDING ANHYDROUS ALUMINUM CHLORIDE, AMOUNTING TO AT LEAST 50% BY WEIGHT OF THE AMOUNT OF COPPER PHTHALOCYANINE HEATING TO ABOUT 180* C., FILTERING, REMOVING THE TRICHLORBENZENE FROM THE FILTER CAKE, AND REMOVING THE EXCESS ALUMINUM CHLORIDE.
Claim 2
Dependent Claim
57 words
A PROCESS FOR THE PRODUCTION OF A NON-CRYSTALLIZING, NON-FLOCCULATING, COPPER PHTHALOCYANINE WHICH COMPRISES CHARGING COPPER PHTHALOCYANINE INTO TRICHLORBENZENE, REMOVING ALL WATER, ADDING ANHYDROUS ALUMINUM CHLORIDE, AMOUNTING TO AT LEAST 50% BY WEIGHT OF THE AMOUNT OF COPPER PHTHALOCYANINE HEATING TO ABOUT 180* C., FILTERING, REMOVING THE TRICHLORBENZENE FROM THE FILTER CAKE, AND REMOVING THE EXCESS ALUMINUM CHLORIDE.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-11-18 | 1956-05-19 | 1956-11-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-11-18 | 1960-05-19 | 1960-11-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-11-18 | 1964-05-19 | 1964-11-18 | $7700.00 | Window Closed / Lapsed |