US3828030A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Chalcone derivatives and preparation thereof
Assignee: Sumitomo Pharma Co Ltd
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Filing: 1970-12-10
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Granted: 1974-08-06
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Expires: 1990-12-10
Abstract
Abstract W-AMINOALKOXYCHALCONES OF THE FOLLOWING GENERAL FORMULA: 1-(((R''-N(-R")-(CH2)N-O-)-PHENYL)-CH=CH-CO-),2-R1,3-R2, 4-R3,5-R4,6-R5-BENZENE AND THEIR PHARMACEUTICALLY ACCEPTABLE ACID ADDITION SALTS HAVING SUPERIOR ANTIHYPERTENSIVE ACTIVITY AND THEREFORE USEFUL FOR PREVENTING AND TREATING HYPERTENSION IN HUMAN, COMPOSITION SUITABLE FOR SUCH PREVENTION AND TREATMENT AND METHODS FOR THE PREPARATION OF THE SAID W-AMINOALKOXYCHALCONES.
Inventors
- 👤 H Kinugasa
- 👤 M Tsukamoto
- 👤 H Mizuta
- 👤 H Uno
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 14:39
CPC Classifications
C; C07; C07D; C07D295/00; C07D295/04; C07D295/08; C07D295/084; C07D295/088; A; A61; A61P; A61P9/00; A61P9/12
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) | 1977-08-05 | 1978-02-04 | 1978-08-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-08-05 | 1982-02-04 | 1982-08-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-08-05 | 1986-02-04 | 1986-08-06 | $7700.00 | Window Closed / Lapsed |