Patent US3758476A successfully refreshed from Google Patents.
US3758476A
Expired / Lapsed
US
⏱️ 0.0 years remaining
2-(thienyl-3'-amino)-1,3-diazacycloalkenes
Assignee: Hoechst AG
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Filing: 1970-08-06
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Granted: 1973-09-11
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Expires: 1990-08-06
Abstract
Abstract 2-(THIENYL-3''-AMINO)-DIAZACYCLOALKENES OF THE FORMULA 2-R1,3-((=N-Z-NH-)>C-NH-),4-R2,5-R3-THIOPHENE HAVING HYPOTENSIVE PROPERTIES, IN WHICH R1, R2 AND R3 ARE HYDROGEN, LOWER ALKYL, HALOGEN, CYANO OR PHENYL OR R2 AND R3 TOGETHER ARE TRIMETHYLENE OR TETRAMETHYLENE, Z IS ALKYLENE OR 2-4 CARBON ATOMS OF WHICH 2-3 ARE IN THE RING, AND THEIR ACID ADDITION SALTS. PROCESS FOR THE PREPATAION OF THE ABOVE COMPOUNDS.
Inventors
- 👤 R Rippel
- 👤 H Ruschig
- 👤 E Lindner
- 👤 M Schorr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 09:12
CPC Classifications
C; C07; C07D; C07D405/00; C07D405/02; C07D405/04; A; A61; A61C; A61C19/00; C07D239/00; C07D239/02; C07D239/24; C07D409/00; C07D409/02; C07D409/12; G; G03; G03B; G03B17/00; G03B17/02
Claims Analysis
Total Claims: 0
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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) | 1976-09-10 | 1977-03-12 | 1977-09-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-09-10 | 1981-03-12 | 1981-09-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-09-10 | 1985-03-12 | 1985-09-11 | $7700.00 | Window Closed / Lapsed |