US2556727A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of finishing phthalocyanine pigments
Assignee: EIDP Inc
•
Filing: 1949-03-05
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Granted: 1951-06-12
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Expires: 1969-03-05
Abstract
No abstract record available.
Inventors
- 👤 Lane Frank Wesley
- 👤 Stratton Arthur John
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 08:59
CPC Classifications
C; C09; C09B; C09B67/00; C09B67/0025; C09B67/0026; C09B67/0032
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
90 words
A PROCESS OF CONVERTING A CRUDE PHTHALOCYANINE COLORING MATTER INTO A FINELY DIVIDED, PIGMENTARY STATE, WHICH COMPRISES SUBJECTING THE SAME TO BALL MILLING WITH GRINDING ELEMENTS NOT GREATER THAN 0.25 INCHES DIAMETER, THE PIGMENT BEING SUSPENDED DURING THE MILLING PROCEDURE IN AN ORGANIC LIQUID WHICH IS NON-CORROSIVE WITH RESPECT TO THE GRINDING ELEMENTS AND WHICH IS SUFFICIENTLY VOLATILE TO PERMIT ITS SEPARATION FROM THE PIGMENT BY STEAM DISTILLATION, THE QUANTITY OF ORGANIC LIQUID EMPLOYED BEING BETWEEN 5 AND 10 PARTS BY WEIGHT FOR EACH PART BY WEIGHT OF SAID PIGMENT.
Claim 2
Dependent Claim
90 words
A PROCESS OF CONVERTING A CRUDE PHTHALOCYANINE COLORING MATTER INTO A FINELY DIVIDED, PIGMENTARY STATE, WHICH COMPRISES SUBJECTING THE SAME TO BALL MILLING WITH GRINDING ELEMENTS NOT GREATER THAN 0.25 INCHES DIAMETER, THE PIGMENT BEING SUSPENDED DURING THE MILLING PROCEDURE IN AN ORGANIC LIQUID WHICH IS NON-CORROSIVE WITH RESPECT TO THE GRINDING ELEMENTS AND WHICH IS SUFFICIENTLY VOLATILE TO PERMIT ITS SEPARATION FROM THE PIGMENT BY STEAM DISTILLATION, THE QUANTITY OF ORGANIC LIQUID EMPLOYED BEING BETWEEN 5 AND 10 PARTS BY WEIGHT FOR EACH PART BY WEIGHT OF SAID PIGMENT.
References Cited (Backward Citations)
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Cited
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Cited
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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) | 1954-06-11 | 1954-12-11 | 1955-06-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-06-11 | 1958-12-11 | 1959-06-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-06-11 | 1962-12-11 | 1963-06-12 | $7700.00 | Window Closed / Lapsed |