US2911407A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Certificate of correction
Assignee: —
•
Filing: —
•
Granted: 1959-11-03
•
Expires: 1976-11-03
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 05:23
CPC Classifications
C; C07; C07D; C07D295/00; C07D295/02; C07D295/023; C07D211/00; C07D211/04; C07D211/06; C07D211/36; C07D211/56; C07D211/58; C07D241/00; C07D241/02; C07D241/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
10 words
A METHOD FOR PREPARING A 2,6-DIALKYLPIPERAZINE CORRESPONDING TO THE FORMULA
Claim 2
Independent Claim
10 words
A METHOD FOR PREPARING A 2,6-DIALKYLPIPERAZINE CORRESPONDING TO THE FORMULA
References Cited (Backward Citations)
US2525223A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-11-02 | 1963-05-04 | 1963-11-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-11-02 | 1967-05-04 | 1967-11-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-11-02 | 1971-05-04 | 1971-11-03 | $7700.00 | Window Closed / Lapsed |