Patent US4439025A successfully refreshed from Google Patents.
Patent US3845050A successfully refreshed from Google Patents.
US3845050A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dihydropyridazone compound substituted by paraimidazolidonylphenyl
Assignee: BASF SE
•
Filing: 1972-10-10
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Granted: 1974-10-29
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Expires: 1992-10-10
Abstract
Abstract 1. A COMPOUND OF THE FORMULA 1-R,3-((6-(O=)-1,4,5,6-TETRAHYDRO-PYRIDAZIN-3-YL)-(1,4- PHENYLENE)-),4-(O=)-IMIDAZOLIDINE IN WHICH R IS ALKYL OF 1 TO 8 CARBON ATOMS OR SAID ALKYL MONO SUBSTITUTED BY PHENYL, METHOXY, ETHOXY OR HYDROXY; CYCLOALKYL OF 5 TO 8 CARBON ATOMS; ALLYL; OR BUTYNYL; AND THE PHARMACEUTICALLY COMPATIBLE ACID ADDITION SALTS OF SAID COMPOUND.
Inventors
- 👤 J Schuster
- 👤 A Amann
- 👤 H Giertz
- 👤 R Lebkuecher
- 👤 H Koenig
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 06:44
CPC Classifications
C; C07; C07D; C07D401/00; C07D401/14
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
5 words
A COMPOUND OF THE FORMULA
Claim 2
Dependent Claim
5 words
A COMPOUND OF THE FORMULA
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) | 1977-10-28 | 1978-04-29 | 1978-10-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-10-28 | 1982-04-29 | 1982-10-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-10-28 | 1986-04-29 | 1986-10-29 | $7700.00 | Window Closed / Lapsed |