US3037025A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for preparing n-alkylsubstituted piperazines
Assignee: Jefferson Chemical Co Inc
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Filing: 1958-12-01
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Granted: 1962-05-29
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Expires: 1978-12-01
Abstract
No abstract record available.
Inventors
- 👤 Norman B Godfrey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 17:50
CPC Classifications
C; C07; C07D; C07D295/00; C07D295/02; C07D295/023
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
16 words
A PROCESS FOR PREPARING AN N-ALKYL-SUBSTITUTED PIPERAZINE WHICH COMPRISES REACTING A COMPOUND, REPRESENTED BY THE FORMULA:
Claim 2
Dependent Claim
16 words
A PROCESS FOR PREPARING AN N-ALKYL-SUBSTITUTED PIPERAZINE WHICH COMPRISES REACTING A COMPOUND, REPRESENTED BY 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) | 1965-05-28 | 1965-11-27 | 1966-05-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-05-28 | 1969-11-27 | 1970-05-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-05-28 | 1973-11-27 | 1974-05-29 | $7700.00 | Window Closed / Lapsed |