Patent EP0113016A2 successfully refreshed from Google Patents.
US3116291A
Expired / Lapsed
US
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9-(propene-3-ylidene-1), and 9-[3'-(nu-hydrox-yalkylpiperazino-nu)-propylidene], xanthenes and thiaxanthenes, and processes for their preparation
Assignee: H Lundbeck AS
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Filing: 1959-12-01
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Granted: 1963-12-31
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Expires: 1979-12-01
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
2026-10-27 21:05
CPC Classifications
C; C07; C07D; C07D335/00; C07D335/04; C07D335/10; C07D335/12; C07D335/20; C07D311/00; C07D311/02; C07D311/78; C07D311/80; C07D311/82; C07D311/90
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
20 words
METHOD FOR THE PREPARATION OF A COMPOUND SELECTED FROM THE CLASS CONSISTING OF (1) XANTHENES AND THIAXANTHENES OF THE FORMULA:
Claim 2
Dependent Claim
20 words
METHOD FOR THE PREPARATION OF A COMPOUND SELECTED FROM THE CLASS CONSISTING OF (1) XANTHENES AND THIAXANTHENES OF THE FORMULA:
Claim 3
Dependent Claim
5 words
2-CHLORO-9-(PROPENE-3-YLIDENE-1)-THIAXANTHENE. 13. 2-CHLORO-9-(3''-(N''-2 - HYDROXYETHYLPIPERAZINE-()PROPYLIDENE)-THIAZANTHENE.
Claim 4
Dependent Claim
5 words
2-CHLORO-9-(PROPENE-3-YLIDENE-1)-THIAXANTHENE. 13. 2-CHLORO-9-(3''-(N''-2 - HYDROXYETHYLPIPERAZINE-()PROPYLIDENE)-THIAZANTHENE.
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) | 1966-12-30 | 1967-07-01 | 1967-12-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-12-30 | 1971-07-01 | 1971-12-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-12-30 | 1975-07-01 | 1975-12-31 | $7700.00 | Window Closed / Lapsed |