US3157659A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for preparing 2, 9-dichloro-quinacridone
Assignee: BASF SE
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Filing: 1962-04-09
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Granted: 1964-11-17
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Expires: 1982-04-09
Abstract
No abstract record available.
Inventors
- 👤 Deuschel Werner
- 👤 Honigmann Berthold
- 👤 Jettmar Werner
- 👤 Schroeder Hans
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 22:50
CPC Classifications
C; C09; C09B; C09B48/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
79 words
A PROCESS FOR THE PRODUCTION OF A PIGMENT DYE WHEREIN 2,9-DICHLORO-7,14-DIOXO-5,7,12,14-TETRAHYDROQUINOLINO(2,3-B)-ACRIDINE IN FINE PARTICLE SIZE IS BROUGHT INTO CONTACT SITH SULFURIC ACID OF THE CONCENTRATION 60% TO 75% AND AT TEMPERATURES OF 145*C. TO 175*C. UNTIL AN X-RAY DIFFRACTION PATTERN SHOWS AT A GONIOMETER ANGLE OF 27.8" ONE LINE OF GREAT INTENSITY, AT 5.4*, 15.3*, 23.3* AND 23.4* FOUR LINES OF MEDIUM INTENSITY AND AT 16.6*, 19.3*, 21.3*, 24.5*, 25.3*, 26.7*, 19.0* AND 30.7* EIGHT LINES OF LOW INTENSITY.
Claim 2
Dependent Claim
79 words
A PROCESS FOR THE PRODUCTION OF A PIGMENT DYE WHEREIN 2,9-DICHLORO-7,14-DIOXO-5,7,12,14-TETRAHYDROQUINOLINO(2,3-B)-ACRIDINE IN FINE PARTICLE SIZE IS BROUGHT INTO CONTACT SITH SULFURIC ACID OF THE CONCENTRATION 60% TO 75% AND AT TEMPERATURES OF 145*C. TO 175*C. UNTIL AN X-RAY DIFFRACTION PATTERN SHOWS AT A GONIOMETER ANGLE OF 27.8" ONE LINE OF GREAT INTENSITY, AT 5.4*, 15.3*, 23.3* AND 23.4* FOUR LINES OF MEDIUM INTENSITY AND AT 16.6*, 19.3*, 21.3*, 24.5*, 25.3*, 26.7*, 19.0* AND 30.7* EIGHT LINES OF LOW INTENSITY.
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) | 1967-11-17 | 1968-05-18 | 1968-11-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-11-17 | 1972-05-18 | 1972-11-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-11-17 | 1976-05-18 | 1976-11-17 | $7700.00 | Window Closed / Lapsed |