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US2909465A
Expired / Lapsed
US
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1, 4-diphenyl-3, 5-diketo pyrazolidine compounds and compositions
Assignee: Abbott GmbH and Co KG
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Filing: 1953-09-09
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Granted: 1959-10-20
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Expires: 1973-09-09
Abstract
No abstract record available.
Inventors
- 👤 Kraft Helmut
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 22:49
CPC Classifications
C; C07; C07D; C07D231/00; C07D231/02; C07D231/10; C07D231/14; C07D231/28; C07D231/30; C07D231/32
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
7 words
THE 1,4-DIPHENYL-3,5-DIKETO PYRAZOLIDINE COMPOUND OF THE FORMULA
Claim 2
Dependent Claim
7 words
THE 1,4-DIPHENYL-3,5-DIKETO PYRAZOLIDINE COMPOUND OF THE FORMULA
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) | 1962-10-19 | 1963-04-20 | 1963-10-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-10-19 | 1967-04-20 | 1967-10-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-10-19 | 1971-04-20 | 1971-10-20 | $7700.00 | Window Closed / Lapsed |