Patent US2357398A successfully refreshed from Google Patents.
US3454701A
Expired / Lapsed
US
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2 - (phenyl - amino) - 1,3 - diazacyclopentene - (2) substitution products for reducing blood pressure
Assignee: C.H. Boehringer Sohn AG and Co KG
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Filing: 1965-12-21
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Granted: 1969-07-08
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Expires: 1985-12-21
Abstract
No abstract record available.
Inventors
- 👤 Karl Zeile
- 👤 Karl Heinz Hauptmann
- 👤 Helmut Stahle
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 03:38
CPC Classifications
C; C07; C07D; C07D233/00; C07D233/04; C07D233/28; C07D233/44; C07D233/50; A; A61; A61K; A61K31/00; C07D233/30; C07D233/42; C07F; C07F9/00; C07F9/02; C07F9/547; C07F9/645; C07F9/6503; C07F9/6506
Claims Analysis
Total Claims: 0
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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) | 1972-07-07 | 1973-01-06 | 1973-07-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-07-07 | 1977-01-06 | 1977-07-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-07-07 | 1981-01-06 | 1981-07-08 | $7700.00 | Window Closed / Lapsed |