US3758321A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Conditioning of phthalocyanine compounds
Assignee: Bayer Corp
•
Filing: 1971-01-25
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Granted: 1973-09-11
•
Expires: 1991-01-25
Abstract
Abstract PHTHALOCYANINE COMPOUNDS, ESPECIALLY HALOGENATED PHTHALOCYANINE COMPOUNDS, ARE CONDITIONED TO PIGMENT FORM BY GRINDING THE UNCONDITIONED COMPOUNDS WHILE SUSPENDED IN AN AQUEOUS MEDIUM COMPRISING A MINOR AMOUNT OF A WATER-IMMISCIBLE VOLATILE ORGANIC LIQUID AND A MAJOR AMOUNT OF WATER. THE RESULTING PIGMENTS ARE SOFTER IN TEXTURE AND OF SUPERIOR LIGHT-FASTNESS COMPARED TO CONVENTIONALLY OBTAINED PHTHALOCYANINES. THE PROCESS FOR THEIR PREPARATION IS SUBSTANTIALLY FREE OF CORROSION AND POLLUTION PROBLEMS WHICH ARE CHARACTERISTIC OF MANY PRIOR ART CONDITIONING PROCESSES.
Inventors
- 👤 J Santimauro
- 👤 H Gerson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 00:12
CPC Classifications
C; C09; C09B; C09B67/00; C09B67/0032
Claims Analysis
Total Claims: 0
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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) | 1976-09-10 | 1977-03-12 | 1977-09-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-09-10 | 1981-03-12 | 1981-09-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-09-10 | 1985-03-12 | 1985-09-11 | $7700.00 | Window Closed / Lapsed |