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Patent US2556726A successfully refreshed from Google Patents.
US2556726A
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Copper-phthalocyanine in pigmentary beta form and a process of making the same
Assignee: EIDP Inc
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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
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:03
CPC Classifications
C; C09; C09B; C09B67/00; C09B67/0032; C09B67/0025; C09B67/0026
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
77 words
AS A NEW PRODUCT, A PIGMENT COMPRISING AN ESSENTIALLY CHLORINE-FREE PHTHALOCYANINE COMPOUND ESSENTIALLY IN THE FORM OF BETA CRYSTALS OF A SIZE NOT GREATER THAN 0.2 MICRON, SAID PIGMENT BEING CHARACTERIZED BY A GREENISH SHADE OF BLUE COMPARED TO THE SHADE OF THE SAME PHTHALOCYANINE COLOR IN ACID-PASTED FORM, SAID PIGMENT BEING FURTHER CHARACTERIZED BY SUBSTANTIAL ABSENCE OF TENDENCY TO INCREASE ITS CRYSTAL SIZE, WITH ATTENTANT LOSS OF TINCTORIAL STRENGTH, WHEN BOILED FOR 1 HOUR IN XYLENE.
Claim 2
Dependent Claim
77 words
AS A NEW PRODUCT, A PIGMENT COMPRISING AN ESSENTIALLY CHLORINE-FREE PHTHALOCYANINE COMPOUND ESSENTIALLY IN THE FORM OF BETA CRYSTALS OF A SIZE NOT GREATER THAN 0.2 MICRON, SAID PIGMENT BEING CHARACTERIZED BY A GREENISH SHADE OF BLUE COMPARED TO THE SHADE OF THE SAME PHTHALOCYANINE COLOR IN ACID-PASTED FORM, SAID PIGMENT BEING FURTHER CHARACTERIZED BY SUBSTANTIAL ABSENCE OF TENDENCY TO INCREASE ITS CRYSTAL SIZE, WITH ATTENTANT LOSS OF TINCTORIAL STRENGTH, WHEN BOILED FOR 1 HOUR IN XYLENE.
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) | 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 |