US2686010A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the manufacture of beta-phthalocyanines in a dispersible form
Assignee: BASF Schweiz AG
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Filing: 1951-09-17
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Granted: 1954-08-10
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Expires: 1971-09-17
Abstract
No abstract record available.
Inventors
- 👤 Wettstein Walter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 20:40
CPC Classifications
C; C09; C09B; C09B67/00; C09B67/0032; C09B67/0001; C09B67/0002; C09B67/0025; C09B67/0026
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
123 words
IN THE MANUFACTURE OF A B-PHTHALOCYANINE IN A DISPERSIBLE FORM, THE B-PHTHALOCYANINE BEING A MEMBER SELECTED FROM THE GROUP CONSISTING OF A METAL-FREE B-PHTHALOCYANINE AND A METALLIFEROUS B-PHTHALOCYANINE, WHICH LATTER DERIVES FROM A METAL HAVING AN ATOMIC WEIGHT BELOW 65, BY GRINDING THE CORRESPONDING CRUDE PHTHALOCYANINE WITH A WATER-SOLUBLE GRINDING SUBSTRATUM UNTIL THE COLOR STRENGTH OF THE GROUND MATERIAL NO LONGER SUBSTANTIALLY INCREASES AND THEREUPON REMOVING THE GRINDING SUBSTRATUM BY WASHING OUT WITH WATER, THE IMPROVEMENT WHICH CONSISTS IN EFFECTING THE GRINDING WITH A SALT SELECTED FROM THE GROUP CONSISTING OF ANHYDROUS SODIUM FERROCYANIDE AND ANHYDROUS BARIUM CHLORIDE AS GRINDING SUBSTRATUM AT A TEMPERATURE WITHIN THE RANGE OF 120 TO 140* C., THE SALT: PIGMENT RATIO BEING FROM ABOUT 2:1 TO ABOUT 3:1.
Claim 2
Dependent Claim
123 words
IN THE MANUFACTURE OF A B-PHTHALOCYANINE IN A DISPERSIBLE FORM, THE B-PHTHALOCYANINE BEING A MEMBER SELECTED FROM THE GROUP CONSISTING OF A METAL-FREE B-PHTHALOCYANINE AND A METALLIFEROUS B-PHTHALOCYANINE, WHICH LATTER DERIVES FROM A METAL HAVING AN ATOMIC WEIGHT BELOW 65, BY GRINDING THE CORRESPONDING CRUDE PHTHALOCYANINE WITH A WATER-SOLUBLE GRINDING SUBSTRATUM UNTIL THE COLOR STRENGTH OF THE GROUND MATERIAL NO LONGER SUBSTANTIALLY INCREASES AND THEREUPON REMOVING THE GRINDING SUBSTRATUM BY WASHING OUT WITH WATER, THE IMPROVEMENT WHICH CONSISTS IN EFFECTING THE GRINDING WITH A SALT SELECTED FROM THE GROUP CONSISTING OF ANHYDROUS SODIUM FERROCYANIDE AND ANHYDROUS BARIUM CHLORIDE AS GRINDING SUBSTRATUM AT A TEMPERATURE WITHIN THE RANGE OF 120 TO 140* C., THE SALT: PIGMENT RATIO BEING FROM ABOUT 2:1 TO ABOUT 3:1.
References Cited (Backward Citations)
US2402167A
Cited
GB569402A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-08-09 | 1958-02-08 | 1958-08-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-08-09 | 1962-02-08 | 1962-08-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-08-09 | 1966-02-08 | 1966-08-10 | $7700.00 | Window Closed / Lapsed |