US3074950A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for producing a modification of gamma 7,14-dioxo-5,7,12,14-tetrahydroquinolino-(2,3-b) acridine
Assignee: BASF SE
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Filing: 1960-08-16
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Granted: 1963-01-22
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Expires: 1980-08-16
Abstract
No abstract record available.
Inventors
- 👤 Deuschel Werner
- 👤 Gundel Friedrich
- 👤 Wuest Hanns
- 👤 Daubach Ewald
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 18:01
CPC Classifications
C; C09; C09B; C09B67/00; C09B67/0025; C09B67/0027; C09B48/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
104 words
A PROCESS FOR THE PRODUCTION OF A YELLOWISH-RED PIGMENT DYE AS A NEW FORM OF THE GAMMA-MODIFICATION OF 7,14-DIOXO-5,7,12,14-TETRAHYDROQUINONOLINO-(2,3-B)ACRIDINE IN AN AVERAGE MEAN PRIMARY PARTICLE SIZE OF MORE THAN 0.1 MICRON AND WITH A SPECIFIC SURFACE OF LESS THAN ABOUT 30 SQUARE METERS PER GRAM, WHICH PROCESS COMPRISES CONTACTING 7,14-DIOXO-5,7,12,14-TETRAHYDROQUINOLINO-(2-3-B)-ACRIDINE IN A STATE OF FINE DIVISION WITH N-METHYLPYRROLIDONE UNTIL SAID 7,14-DIOXO-5,7,12,14-TETRAHYDROQUINOLINO-(2,3-B)-ACRIDINE IS CONVERTED TO A NEW CRYSTALLINE FORM HAVING A X-RAY DIFFRACTION PATTERN EXHIBITING AT A DOUBLE GLANCING ANGLE OF 6.5*, 13.7* AND 26.4* THREE POWEERFUL LINES, AT 13.1*, 13.3*, AND 23.8* THREE MEDIUM LINES, AND AT 17.0*, 20.5* AND 25.0* THREE WEAK LINES.
Claim 2
Dependent Claim
104 words
A PROCESS FOR THE PRODUCTION OF A YELLOWISH-RED PIGMENT DYE AS A NEW FORM OF THE GAMMA-MODIFICATION OF 7,14-DIOXO-5,7,12,14-TETRAHYDROQUINONOLINO-(2,3-B)ACRIDINE IN AN AVERAGE MEAN PRIMARY PARTICLE SIZE OF MORE THAN 0.1 MICRON AND WITH A SPECIFIC SURFACE OF LESS THAN ABOUT 30 SQUARE METERS PER GRAM, WHICH PROCESS COMPRISES CONTACTING 7,14-DIOXO-5,7,12,14-TETRAHYDROQUINOLINO-(2-3-B)-ACRIDINE IN A STATE OF FINE DIVISION WITH N-METHYLPYRROLIDONE UNTIL SAID 7,14-DIOXO-5,7,12,14-TETRAHYDROQUINOLINO-(2,3-B)-ACRIDINE IS CONVERTED TO A NEW CRYSTALLINE FORM HAVING A X-RAY DIFFRACTION PATTERN EXHIBITING AT A DOUBLE GLANCING ANGLE OF 6.5*, 13.7* AND 26.4* THREE POWEERFUL LINES, AT 13.1*, 13.3*, AND 23.8* THREE MEDIUM LINES, AND AT 17.0*, 20.5* AND 25.0* THREE WEAK LINES.
References Cited (Backward Citations)
US2844484A
Cited
US2844485A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-01-21 | 1966-07-23 | 1967-01-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-01-21 | 1970-07-23 | 1971-01-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-01-21 | 1974-07-23 | 1975-01-22 | $7700.00 | Window Closed / Lapsed |