US2606906A
Expired / Lapsed
US
⏱️ 0.0 years remaining
1-(2-pyridyl) piperazine and process of preparing same
Assignee: Wyeth Holdings LLC
•
Filing: 1948-10-14
•
Granted: 1952-08-12
•
Expires: 1968-10-14
Abstract
No abstract record available.
Inventors
- 👤 Hultquist Martin Everett
- 👤 Howard Kenneth Leon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 17:30
CPC Classifications
C; C07; C07D; C07D239/00; C07D239/02; C07D239/24; C07D239/28; C07D239/32; C07D239/42; C07D213/00; C07D213/02; C07D213/04; C07D213/60; C07D213/72; C07D213/74; C07D241/00; C07D241/02; C07D241/10; C07D241/14; C07D241/20; C07D277/00; C07D277/02; C07D277/20; C07D277/32; C07D277/38; C07D277/42
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
6 words
A 1-HETEROCYCLIC PIPERAZINE OF THE FORMULA
Claim 2
Dependent Claim
6 words
A 1-HETEROCYCLIC PIPERAZINE OF THE FORMULA
References Cited (Backward Citations)
US2459367A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-08-12 | 1956-02-11 | 1956-08-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-08-12 | 1960-02-11 | 1960-08-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-08-12 | 1964-02-11 | 1964-08-12 | $7700.00 | Window Closed / Lapsed |