US2799595A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of phthalocyanine pigments
Assignee: EIDP Inc
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Filing: 1953-11-12
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Granted: 1957-07-16
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Expires: 1973-11-12
Abstract
No abstract record available.
Inventors
- 👤 Stanley F Kudzin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 17:42
CPC Classifications
C; C09; C09B; C09B67/00; C09B67/0001; C09B67/0022; C09B67/0023; C09B67/0033; C09B67/0034; C09B67/0035
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
76 words
THE PROCESS OF SUB-DIVISION OF A CHLORINE-CONTAINING PHTHALOCYANINE PIGMENT CONTAINING 2 TO 15 MOL PERCENT OF A COSYNTHESIZED PHTHALOCYANINE 4-MONO-SULFONIC ACID WHICH COMPRISES BALL-MILLING THE PIGMENT SUSPENDED IN 5 PARTS TO 10 PARTS BY WEIGHT OF A CHLORINATED HYDROCARBON FOR EACH PART BY WEIGHT OF THE PIGMENT WITH GRINDING ELEMENTS NOT GREATER THAN 0.25 INCH IN DIAMETER, REMOVING SAID CHLORINATED HYDROCARBON BY STEAM DISTILLATION AFTER COMPLETION OF THE BALL MILLING STEP, AND THEN DRYING THE PIGMENT.
Claim 2
Dependent Claim
76 words
THE PROCESS OF SUB-DIVISION OF A CHLORINE-CONTAINING PHTHALOCYANINE PIGMENT CONTAINING 2 TO 15 MOL PERCENT OF A COSYNTHESIZED PHTHALOCYANINE 4-MONO-SULFONIC ACID WHICH COMPRISES BALL-MILLING THE PIGMENT SUSPENDED IN 5 PARTS TO 10 PARTS BY WEIGHT OF A CHLORINATED HYDROCARBON FOR EACH PART BY WEIGHT OF THE PIGMENT WITH GRINDING ELEMENTS NOT GREATER THAN 0.25 INCH IN DIAMETER, REMOVING SAID CHLORINATED HYDROCARBON BY STEAM DISTILLATION AFTER COMPLETION OF THE BALL MILLING STEP, AND THEN DRYING THE PIGMENT.
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) | 1960-07-15 | 1961-01-14 | 1961-07-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-07-15 | 1965-01-14 | 1965-07-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-07-15 | 1969-01-14 | 1969-07-16 | $7700.00 | Window Closed / Lapsed |