US3535312A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Novel 22-amino-23,24-bisnorcholane derivatives
Assignee: Individual
•
Filing: 1968-02-07
•
Granted: 1970-10-20
•
Expires: 1988-02-07
Abstract
No abstract record available.
Inventors
- 👤 Rainer Philippson
- 👤 Helmut Hauser
- 👤 Emanuel Kaspar
- 👤 Mahmud Muftic
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 16:52
CPC Classifications
C; C07; C07J; C07J41/00; C07J41/0033; C07J41/0055; C07J31/00; C07J31/006; C07J43/00; C07J43/003
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2846432A
Cited
US3272708A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-10-19 | 1974-04-20 | 1974-10-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-10-19 | 1978-04-20 | 1978-10-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-10-19 | 1982-04-20 | 1982-10-20 | $7700.00 | Window Closed / Lapsed |