US3196156A
Expired / Lapsed
US
⏱️ 0.0 years remaining
1, 4-bis-(3-ethyleniminopropionyl)-piperazine and alkyl derivatives thereof
Assignee: Sumitomo Chemical Co Ltd
•
Filing: 1964-04-03
•
Granted: 1965-07-20
•
Expires: 1984-04-03
Abstract
No abstract record available.
Inventors
- 👤 Inaba Shigeho
- 👤 Misaki Atsuko
- 👤 Saito Chiharu
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 23:52
CPC Classifications
C; C07; C07D; C07D203/00; C07D203/04; C07D203/06; C07D203/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
5 words
ALKYLENIMINOPROPIONYL PIJPERAZINE OF THE FORMULA:
Claim 2
Dependent Claim
5 words
ALKYLENIMINOPROPIONYL PIJPERAZINE OF THE FORMULA:
References Cited (Backward Citations)
CA673586A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-07-19 | 1969-01-18 | 1969-07-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-07-19 | 1973-01-18 | 1973-07-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-07-19 | 1977-01-18 | 1977-07-20 | $7700.00 | Window Closed / Lapsed |