US3159636A
Expired / Lapsed
US
⏱️ 0.0 years remaining
1-amino-4-(xanthenyl and thioxanthenyl) piperazines
Assignee: GD Searle LLC
•
Filing: 1963-07-05
•
Granted: 1964-12-01
•
Expires: 1983-07-05
Abstract
No abstract record available.
Inventors
- 👤 Yonan Peter
- 👤 John W Cusic
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 19:37
CPC Classifications
C; C07; C07D; C07D311/00; C07D311/02; C07D311/78; C07D311/80; C07D311/82; C07D311/84; C07D311/88; C07D335/00; C07D335/04; C07D335/10; C07D335/12; C07D335/14; C07D335/18
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
5 words
A COMPOUND OF THE FORMULA
Claim 2
Dependent Claim
5 words
A COMPOUND OF THE FORMULA
References Cited (Backward Citations)
US2985653A
Cited
GB925538A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-12-01 | 1968-06-01 | 1968-12-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-12-01 | 1972-06-01 | 1972-12-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-12-01 | 1976-06-01 | 1976-12-01 | $7700.00 | Window Closed / Lapsed |