US3342811A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Steroidal amines and amides, and process for the preparation of same
Assignee: University College London
•
Filing: 1967-01-13
•
Granted: 1967-09-19
•
Expires: 1987-01-13
Abstract
No abstract record available.
Inventors
- 👤 Sarel Shalom
- 👤 Yanuka Yehuda
- 👤 Shalon Yehuda
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 13:03
CPC Classifications
C; C07; C07J; C07J41/00; C07C; C07C39/00; C07C39/18; C07J75/00; C07J9/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
8 words
NOVEL DERIVATIVES OF PERHYDRO CYCLOPENTANOPHENANTRENE OF FORMULA I
Claim 2
Dependent Claim
8 words
NOVEL DERIVATIVES OF PERHYDRO CYCLOPENTANOPHENANTRENE OF FORMULA I
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) | 1970-09-18 | 1971-03-20 | 1971-09-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-09-18 | 1975-03-20 | 1975-09-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-09-18 | 1979-03-20 | 1979-09-19 | $7700.00 | Window Closed / Lapsed |