US3519640A
Expired / Lapsed
US
⏱️ 0.0 years remaining
4-substituted-1,2-diphenyl-3,5-dioxo-pyrazolidines
Assignee: Spofa Vereinigte Pharma Werke
•
Filing: 1966-12-21
•
Granted: 1970-07-07
•
Expires: 1986-12-21
Abstract
No abstract record available.
Inventors
- 👤 Vaclav Musil
- 👤 Oldrich Nemecek
- 👤 Jitka Muratova
- 👤 Bohumila Brunova
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 19:23
CPC Classifications
C; C07; C07D; C07D231/00; C07D231/02; C07D231/10; C07D231/14; C07D231/28; C07D231/30; C07D231/32
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
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) | 1973-07-06 | 1974-01-05 | 1974-07-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-07-06 | 1978-01-05 | 1978-07-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-07-06 | 1982-01-05 | 1982-07-07 | $7700.00 | Window Closed / Lapsed |