US3257384A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Derivatives of 25-azacholesterol and 22-oxa-25-azacholesterol
Assignee: Pharmacia and Upjohn Co
•
Filing: 1963-01-04
•
Granted: 1966-06-21
•
Expires: 1983-01-04
Abstract
No abstract record available.
Inventors
- 👤 Norman A Nelson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 16:17
CPC Classifications
C; C07; C07J; C07J41/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
13 words
A COMPOUND SELECTED FROM THE CLASS CONSISTING OF (A) COMPOUNDS HAVING THE FORMULA:
Claim 2
Dependent Claim
13 words
A COMPOUND SELECTED FROM THE CLASS CONSISTING OF (A) COMPOUNDS HAVING THE FORMULA:
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-06-20 | 1969-12-20 | 1970-06-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-06-20 | 1973-12-20 | 1974-06-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-06-20 | 1977-12-20 | 1978-06-21 | $7700.00 | Window Closed / Lapsed |