US2863883A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Anthraquinone chloroaldazines and production thereof
Assignee: Wyeth Holdings LLC
•
Filing: 1957-11-18
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Granted: 1958-12-09
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Expires: 1977-11-18
Abstract
No abstract record available.
Inventors
- 👤 Klingsberg Erwin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 09:28
CPC Classifications
C; C09; C09B; C09B1/00; C09B1/16; C09B1/20; C09B1/36; C09B1/42
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
25 words
THE PROCESS OF PREPARING AN ANTHRAQUINONYL CHLOROALDAZINE WHICH COMPRISES HEATING AN UNAMINATED, UNHYDROXYLATED 2-ANTHRAQUINONYL ALDAZINE WITH A CHLORINATING AGENT IN NITROBENZENE AT TEMPERATURES ABOVE 60*C.
Claim 2
Dependent Claim
25 words
THE PROCESS OF PREPARING AN ANTHRAQUINONYL CHLOROALDAZINE WHICH COMPRISES HEATING AN UNAMINATED, UNHYDROXYLATED 2-ANTHRAQUINONYL ALDAZINE WITH A CHLORINATING AGENT IN NITROBENZENE AT TEMPERATURES ABOVE 60*C.
Claim 3
Dependent Claim
31 words
THE PROCESS OF PREPARING A DIARYL DICHLORO ALDAZINE WHICH COMPRISES HEATING AN N,N''-DIAROYL HYDRAZINE, IN WHICH ONE OF THE ARYL GROUPS IS AN ANTHRAQUINONYL CARBONYL RADICAL, WITH PHOSPHORUS PENTACHLORIDE ABOVE 100*C.
Claim 4
Dependent Claim
31 words
THE PROCESS OF PREPARING A DIARYL DICHLORO ALDAZINE WHICH COMPRISES HEATING AN N,N''-DIAROYL HYDRAZINE, IN WHICH ONE OF THE ARYL GROUPS IS AN ANTHRAQUINONYL CARBONYL RADICAL, WITH PHOSPHORUS PENTACHLORIDE ABOVE 100*C.
Claim 5
Dependent Claim
4 words
CHLOROALDAZINES OF THE STRUCTURE:
Claim 6
Dependent Claim
4 words
CHLOROALDAZINES OF THE STRUCTURE:
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) | 1961-12-08 | 1962-06-09 | 1962-12-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-12-08 | 1966-06-09 | 1966-12-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-12-08 | 1970-06-09 | 1970-12-09 | $7700.00 | Window Closed / Lapsed |