US2846441A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of a solvent-stable alpha-modification of copper phthalocyanine
Assignee: BASF SE
•
Filing: 1954-08-17
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Granted: 1958-08-05
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Expires: 1974-08-17
Abstract
No abstract record available.
Inventors
- 👤 Mneblbauer Fritz
- 👤 Zell Robert
- 👤 Plankenhorn Erwin
- 👤 Jutz Erich
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 06:32
CPC Classifications
C; C09; C09B; C09B67/00; C09B67/0032; C09B47/00; C09B47/04; C09B47/06; C09B67/0025; C09B67/0026; C09B67/0033; C09B67/0034; C09B67/0035
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
82 words
A PROCESS FOR THE PRODUCTION OF A SOLVENT-STABLE COPPER PHTHALOCYANINE ALPHA-MODIFICATION WHICH COMPRISES DISSOLVING IN CENCENTRATED SULFURIC ACID UNSUBSTITUTED COPPER PHTHALOCYANINE AND SUCH AN AMOUNT OF COPPER PHTHALOCYANINE WHICH IS SUBSTITUTED ONLY IN THE 4-POSITIONS OF THE BENZENE NUCLEI WITH FROM 1 TO 4 RADICALS OF THE GROUP CONSISTING OF CHLORINE, NITRO, AND AMINO THAT THERE IS PRESENT IN SOLUTION ONE SAID RADICAL FOR FROM 1 TO 8 MOLECULES OF PHTHALOCYANINE, POURING THE SOLUTION INTO HOT WATER, AND RECOVERING THE RESULTING PRECIPITATE.
Claim 2
Dependent Claim
82 words
A PROCESS FOR THE PRODUCTION OF A SOLVENT-STABLE COPPER PHTHALOCYANINE ALPHA-MODIFICATION WHICH COMPRISES DISSOLVING IN CENCENTRATED SULFURIC ACID UNSUBSTITUTED COPPER PHTHALOCYANINE AND SUCH AN AMOUNT OF COPPER PHTHALOCYANINE WHICH IS SUBSTITUTED ONLY IN THE 4-POSITIONS OF THE BENZENE NUCLEI WITH FROM 1 TO 4 RADICALS OF THE GROUP CONSISTING OF CHLORINE, NITRO, AND AMINO THAT THERE IS PRESENT IN SOLUTION ONE SAID RADICAL FOR FROM 1 TO 8 MOLECULES OF PHTHALOCYANINE, POURING THE SOLUTION INTO HOT WATER, AND RECOVERING THE RESULTING PRECIPITATE.
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) | 1961-08-04 | 1962-02-03 | 1962-08-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-08-04 | 1966-02-03 | 1966-08-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-08-04 | 1970-02-03 | 1970-08-05 | $7700.00 | Window Closed / Lapsed |