US3520779A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Synthesis of steroids
Assignee: ER Squibb and Sons LLC
•
Filing: 1967-05-22
•
Granted: 1970-07-14
•
Expires: 1987-05-22
Abstract
No abstract record available.
Inventors
- 👤 Seymour D Levine
- 👤 Saul L Neidleman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 05:47
CPC Classifications
C; C07; C07J; C07J1/00; C07J75/00; Y; Y10; Y10S; Y10S435/00; Y10S435/8215; Y10S435/911
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3102080A
Cited
US3365467A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-07-13 | 1974-01-12 | 1974-07-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-07-13 | 1978-01-12 | 1978-07-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-07-13 | 1982-01-12 | 1982-07-14 | $7700.00 | Window Closed / Lapsed |