US3062821A
Expired / Lapsed
US
⏱️ 0.0 years remaining
1-(2-phenethyl)-4-lower-alkyl-2-piperazinones and process for the preparation thereof
Assignee: STWB Inc
•
Filing: 1960-08-24
•
Granted: 1962-11-06
•
Expires: 1980-08-24
Abstract
No abstract record available.
Inventors
- 👤 Archer Sydney
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 07:39
CPC Classifications
C; C07; C07D; C07D241/00; C07D241/02; C07D241/06; C07D241/08
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
5 words
1-(2-3,4-DIMETHOXYPHENYL)ETHYL) - 4 - METHYL-2PIPERAZINONE.
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) | 1965-11-05 | 1966-05-07 | 1966-11-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-11-05 | 1970-05-07 | 1970-11-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-11-05 | 1974-05-07 | 1974-11-06 | $7700.00 | Window Closed / Lapsed |