Patent US2699441A successfully refreshed from Google Patents.
US2699441A
Expired / Lapsed
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Process for the manufacture of mixtures of alkali metal and metalfree phthalocyanines
Assignee: BASF Schweiz AG
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Filing: 1952-02-04
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Granted: 1955-01-11
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Expires: 1972-02-04
Abstract
No abstract record available.
Inventors
- 👤 Wettstein Walter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 14:38
CPC Classifications
C; C09; C09B; C09B47/00; C09B47/04; C09B47/30
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
84 words
A PROCESS FOR THE MANUFACTURE OF MIXTURES OF ALKALI METAL PHTHALOCYANINES AND METAL-FREE PHTHALOCYANINES COMPRISING ADDING AN ALKALI METAL TO A SOLUTION OF PHTHALONITRILE IN AN ALCOHOL, WHICH IS DILUTED WITH AN ORGANIC SOLVENT INERT WITH RESPECT TO THE REACTION COMPONENTS THE ADDITION OF THE ALKALI METAL BEING EFFECTED IN SMALL PORTIONS AND AT A TEMPERATURE WITHIN THE RANGE OF 100 TO 190*C., AND THEREUPON HEATING THE REACTION MIXTURE AT A TEMPERATURE WITHIN THE RANGE OF 160 TO 200*C. UNTIL THE REACTION IS COMPLETE.
Claim 2
Dependent Claim
84 words
A PROCESS FOR THE MANUFACTURE OF MIXTURES OF ALKALI METAL PHTHALOCYANINES AND METAL-FREE PHTHALOCYANINES COMPRISING ADDING AN ALKALI METAL TO A SOLUTION OF PHTHALONITRILE IN AN ALCOHOL, WHICH IS DILUTED WITH AN ORGANIC SOLVENT INERT WITH RESPECT TO THE REACTION COMPONENTS THE ADDITION OF THE ALKALI METAL BEING EFFECTED IN SMALL PORTIONS AND AT A TEMPERATURE WITHIN THE RANGE OF 100 TO 190*C., AND THEREUPON HEATING THE REACTION MIXTURE AT A TEMPERATURE WITHIN THE RANGE OF 160 TO 200*C. UNTIL THE REACTION IS COMPLETE.
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) | 1958-01-10 | 1958-07-12 | 1959-01-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-01-10 | 1962-07-12 | 1963-01-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-01-10 | 1966-07-12 | 1967-01-11 | $7700.00 | Window Closed / Lapsed |