Patent US3306903A successfully refreshed from Google Patents.
US3306903A
Expired / Lapsed
US
⏱️ 0.0 years remaining
1-aminopyridyl-4-(phenyl or pyridyl)-piperazines and intermediates
Assignee: Council of Scientific and Industrial Research
•
Filing: 1965-10-07
•
Granted: 1967-02-28
•
Expires: 1985-10-07
Abstract
No abstract record available.
Inventors
- 👤 Jain Padam Chand
- 👤 Anand Nitya
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 22:34
CPC Classifications
C; C07; C07D; C07D401/00; C07D401/02; C07D401/04; C07D213/00; C07D213/02; C07D213/04; C07D213/60; C07D213/72
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
3 words
1-PHENYL-4-(NITROPYRIDYL)PIPERAZINE. 13. 1-PHENYL-4-(AMINOPYRIDYL)PIPERAZINE.
Claim 2
Dependent Claim
3 words
1-PHENYL-4-(NITROPYRIDYL)PIPERAZINE. 13. 1-PHENYL-4-(AMINOPYRIDYL)PIPERAZINE.
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) | 1970-02-27 | 1970-08-29 | 1971-02-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-02-27 | 1974-08-29 | 1975-02-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-02-27 | 1978-08-29 | 1979-02-28 | $7700.00 | Window Closed / Lapsed |