Patent US2864823A successfully refreshed from Google Patents.
US2864823A
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Process for the production of acylamino-amino-anthraquinones
Assignee: Bayer AG
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Filing: 1955-08-04
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Granted: 1958-12-16
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Expires: 1975-08-04
Abstract
No abstract record available.
Inventors
- 👤 Schwechten Heinz-Werner
- 👤 Neeff Rutger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 23:54
CPC Classifications
C; C09; C09B; C09B1/00; C09B1/16; C09B1/20; C09B1/36; C09B1/44; C09B5/00; C09B5/02
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
85 words
A PROCESS FOR THE PRODUCTION OF ACYLAMINO -AMINO -AMINO-ANTHRAQINONES WHICH COMPRISES TREATING WITH A MINERAL ACID AT A TEMPERATURE BETWEEN 40*C. TO 100*C. A MEMBER SELECTED FROM THE GROUP CONSISTING OF ACETYLAMINO-ANTHRAQUINONE AND BENZOYLAMINO-ANTHRAQUINONE, SAID MEMBER CONTAINING A FURTHER ACYLAMINO GROUP ATTACHED TO THE ANTHRAQUINONE NUCLEUS, THE ACYL RADICAL OF WHICH IS SELECTED FROM THE GROUP CONSISTING OF PYRIDINE CARBONYL, QUINOLINE CARBONYL, PHTHALYL QUINOLINE CARBONYL, THIAZOLE CARBONYL, THIAZOLE-ANTHRONE CARBONYL, AND ANTHRAPYRIMIDINE CARBONYL. 4.THE PROCESS OF CLAIM 1 WHEREIN THE BENZOYLAMINOANTHRAQUINONE IS 1-(5'',6''-PHTHALYLQUINOLINE -8''-CARBONYL)AMINO -5-BENZOYLAMINO-ANTL REQUINONE.
References Cited (Backward Citations)
US2040860A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-12-15 | 1962-06-16 | 1962-12-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-12-15 | 1966-06-16 | 1966-12-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-12-15 | 1970-06-16 | 1970-12-16 | $7700.00 | Window Closed / Lapsed |