US2745783A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Substituted 1. 2-diphenyl-3. 5-dioxo-pyrazolidines
Assignee: Novartis AG
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Filing: 1954-04-01
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Granted: 1956-05-15
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Expires: 1974-04-01
Abstract
No abstract record available.
Inventors
- 👤 Hafliger Franz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 01:38
CPC Classifications
C; C07; C07D; C07D231/00; C07D231/02; C07D231/10; C07D231/14; C07D231/28; C07D231/30; C07D231/32; C07D231/34
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
12 words
A SUBSTITUTED 1,2-DIPHENYL - 3. - DIOXO-PYRAZOLIDINE CORRESPONDING TO THE GENERAL 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) | 1959-05-15 | 1959-11-14 | 1960-05-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-05-15 | 1963-11-14 | 1964-05-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-05-15 | 1967-11-14 | 1968-05-15 | $7700.00 | Window Closed / Lapsed |