US2695295A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Unsymmetrical n, n'-substituted ethylenediamine and piperazine compounds
Assignee: Janssen Pharmaceuticals Inc
•
Filing: 1952-12-19
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Granted: 1954-11-23
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Expires: 1972-12-19
Abstract
No abstract record available.
Inventors
- 👤 Ansel P Swain
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 18:18
CPC Classifications
C; C07; C07D; C07D295/00; C07D295/04; C07D295/08; C07D295/084; C07D295/088; C07D319/00; C07D319/10; C07D319/14; C07D319/16; C07D319/20
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
10 words
UNSYMMETRICAL N,N''-DISUBSTITUTED ETHYLENEDIAMINE COMPOUNDS HAVING THE FOLLOWING FUNDAMENTAL STRUCTURAL FORMULA:
Claim 2
Dependent Claim
10 words
UNSYMMETRICAL N,N''-DISUBSTITUTED ETHYLENEDIAMINE COMPOUNDS HAVING THE FOLLOWING FUNDAMENTAL STRUCTURAL FORMULA:
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) | 1957-11-22 | 1958-05-24 | 1958-11-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-11-22 | 1962-05-24 | 1962-11-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-11-22 | 1966-05-24 | 1966-11-23 | $7700.00 | Window Closed / Lapsed |