Patent EP1074009B1 successfully refreshed from Google Patents.
US2764584A
Expired / Lapsed
US
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3, 6-dioxy-pyridazines
Assignee: CIBA PHARM PROD Inc
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Filing: 1954-02-25
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Granted: 1956-09-25
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Expires: 1974-02-25
Abstract
No abstract record available.
Inventors
- 👤 Druey Jean
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 02:16
CPC Classifications
C; C07; C07D; C07D237/00; C07D237/02; C07D237/06; C07D237/10; C07D237/14; C07D237/16
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
58 words
3 - (OR'') - 6 - (O-R") - 4 - (R1) - 5 - (R2) PYRIDAZINES WHEREIN R'' AND R'''' ARE SELECTED FROM THE GROUP CONSISTING OF LOWER ALKYL, LOWER ALKENYL, LOWER ALKOXY-LOWER ALKYL, LOWER ALKOXY-LOWER ALKOXY-LOWER ALKYL, PHENYL AND BENZYL RADICALS AND R1 AND R2 ARE SELECTED FROM THE GROUP CONSISTING OF HYDROGEN AND LOWER ALKYL RADICALS.
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) | 1959-09-25 | 1960-03-26 | 1960-09-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-09-25 | 1964-03-26 | 1964-09-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-09-25 | 1968-03-26 | 1968-09-25 | $7700.00 | Window Closed / Lapsed |