US2940969A
Expired / Lapsed
US
⏱️ 0.0 years remaining
1-substituted-4-[3-(9-xanthylidene)-propyl] piperazines and 1-substituted-4-[3-(10-thiaxanthylidene) propyl]-piperazines
Assignee: Wyeth Holdings LLC
•
Filing: 1957-07-18
•
Granted: 1960-06-14
•
Expires: 1977-07-18
Abstract
No abstract record available.
Inventors
- 👤 Guido E Bonvicino
- 👤 Jr Robert A Hardy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 22:11
CPC Classifications
C; C07; C07D; C07D311/00; C07D311/02; C07D311/78; C07D311/80; C07D311/82; C07D311/90; C07D335/00; C07D335/04; C07D335/10; C07D335/12; C07D335/20
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
23 words
A COMPOUND SELECTED FROM THE GROUP CONSISTING OF 1-SUBSTITUTED - 4 - (3-(9-XANTHYLIDENE)PROPYL)PIPERAZINES AND 1-SUBSTITUTED - 4 - (3-(10-THIAXANTHYLIDENE)PROPYL)PIPERAZINES, CORRESPONDING TO THE FORMULA:
Claim 2
Dependent Claim
23 words
A COMPOUND SELECTED FROM THE GROUP CONSISTING OF 1-SUBSTITUTED - 4 - (3-(9-XANTHYLIDENE)PROPYL)PIPERAZINES AND 1-SUBSTITUTED - 4 - (3-(10-THIAXANTHYLIDENE)PROPYL)PIPERAZINES, CORRESPONDING TO 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) | 1963-06-14 | 1963-12-14 | 1964-06-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-06-14 | 1967-12-14 | 1968-06-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-06-14 | 1971-12-14 | 1972-06-14 | $7700.00 | Window Closed / Lapsed |