US3149103A
Expired / Lapsed
US
⏱️ 0.0 years remaining
2-substituted-9-(3'-aminopropylidene)-thiaxanthene amine exchange reaction
Assignee: H Lundbeck AS
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Filing: 1960-07-07
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Granted: 1964-09-15
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Expires: 1980-07-07
Abstract
No abstract record available.
Inventors
- 👤 Petersen Povl Viggo
- 👤 Niels O Lassen
- 👤 Torkil O Holm
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 02:23
CPC Classifications
C; C07; C07D; C07D409/00; C07D409/02; C07D409/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
74 words
A PROCESS FOR THE PRODUCTION OF 9-(3''-N-(N''-HYDROXY - LOWER - ALKYL)-PIPERAZINYLPROPYLIDENE)-THIAXANTHENES FROM A 9-(3''-DI-LOWER-ALKYLAMINOPROPYLIDENE)-THIAXANTHENE WHICH COMPRISES HEATING SAID STARTING DI-LOWERALKYLAMINOTHIAXANTHENE COMPOUND TOGETHER WITH AN EXCESS OF N-(HYDROXY-LOWER-AKYL)-PIPERAZINE WHICH BOILS HIGHER THAN THE AMINE H-NR1R2, WHEREIN R1 AND R2 ARE THE SAME AS THE LOWER-ALKYL GROUPS OF THE STARTING DI-LOWERALKYLAMINO THIAXANTHENE COMPOUND, AT A TEMPERATURE ABOVE 100% CENTIGRADE TO CAUSE CONVERSION OF SAID STARTING DI-LOWER-ALKYLAMINO THIXANTHENE COMPOUND TO THE DESIRED 9 - (3'' - N-(N''-HYDROXY-LOWER-ALKYL)-PIPERAZINYLPROPYLIDENE)-THIXANTHENE.
Claim 2
Dependent Claim
74 words
A PROCESS FOR THE PRODUCTION OF 9-(3''-N-(N''-HYDROXY - LOWER - ALKYL)-PIPERAZINYLPROPYLIDENE)-THIAXANTHENES FROM A 9-(3''-DI-LOWER-ALKYLAMINOPROPYLIDENE)-THIAXANTHENE WHICH COMPRISES HEATING SAID STARTING DI-LOWERALKYLAMINOTHIAXANTHENE COMPOUND TOGETHER WITH AN EXCESS OF N-(HYDROXY-LOWER-AKYL)-PIPERAZINE WHICH BOILS HIGHER THAN THE AMINE H-NR1R2, WHEREIN R1 AND R2 ARE THE SAME AS THE LOWER-ALKYL GROUPS OF THE STARTING DI-LOWERALKYLAMINO THIAXANTHENE COMPOUND, AT A TEMPERATURE ABOVE 100% CENTIGRADE TO CAUSE CONVERSION OF SAID STARTING DI-LOWER-ALKYLAMINO THIXANTHENE COMPOUND TO THE DESIRED 9 - (3'' - N-(N''-HYDROXY-LOWER-ALKYL)-PIPERAZINYLPROPYLIDENE)-THIXANTHENE.
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) | 1967-09-15 | 1968-03-16 | 1968-09-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-09-15 | 1972-03-16 | 1972-09-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-09-15 | 1976-03-16 | 1976-09-15 | $7700.00 | Window Closed / Lapsed |