US2887488A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Piperazine derivatives
Assignee: EIDP Inc
•
Filing: 1957-09-23
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Granted: 1959-05-19
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Expires: 1977-09-23
Abstract
No abstract record available.
Inventors
- 👤 Robert A Smiley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 09:37
CPC Classifications
C; C07; C07D; C07D295/00; C07D295/04; C07D295/06; C07D295/073; C07D295/12; C07D295/125; C08; C08G; C08G59/00; C08G59/18; C08G59/40; C08G59/50; C08G59/5046; C08G59/5053; C08G59/5073
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
20 words
A NEW COMPOSITION OF MATTER SELECTED FROM THE GROUP CONSISTING OF N,N''-BIS((1-AMINOCYCLOALKYL) METHYL) PIPERAZINE AND N,N''BIS((1-AMINOCYCLOALKYL) METHYL) CALKYL SUBSTITUTED PIPERAZINES.
Claim 2
Dependent Claim
20 words
A NEW COMPOSITION OF MATTER SELECTED FROM THE GROUP CONSISTING OF N,N''-BIS((1-AMINOCYCLOALKYL) METHYL) PIPERAZINE AND N,N''BIS((1-AMINOCYCLOALKYL) METHYL) CALKYL SUBSTITUTED PIPERAZINES.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-05-18 | 1962-11-17 | 1963-05-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-05-18 | 1966-11-17 | 1967-05-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-05-18 | 1970-11-17 | 1971-05-19 | $7700.00 | Window Closed / Lapsed |