US3585219A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the production of sulfonated primary aminoanthraquinone by conversion of an n-cyclohexyl-aminoanthraquinone
Assignee: BASF SE
•
Filing: 1967-02-13
•
Granted: 1971-06-15
•
Expires: 1987-02-13
Abstract
Abstract THIS SPECIFICATION DISCLOSES THE PRODUCTION OF SULFONATED AMINOANTHRAQUINONES BY THE ACTION OF OLEUM ON N-CYCLOHEXYLAMINOANTHROANTHRAQUINONES AT A TEMPERATURE OF FROM 50 TO 160*C. AMINOANTHRAQUINONES ARE VALUABLE INTERMEDIATES FOR THE PRODUCTION OF DYESTUFFS.
Inventors
- 👤 Willy Braun
- 👤 Manfred Ruske
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 11:53
CPC Classifications
C; C09; C09B; C09B1/00; C09B1/50; C09B1/16; C09B1/20; C09B1/22; C09B1/24; C09B1/56; C09B1/58; C09B1/585
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-06-14 | 1974-12-14 | 1975-06-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-06-14 | 1978-12-14 | 1979-06-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-06-14 | 1982-12-14 | 1983-06-15 | $7700.00 | Window Closed / Lapsed |