US2846446A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Synthesis of steroids
Assignee: Monsanto Chemicals Ltd
•
Filing: 1954-06-14
•
Granted: 1958-08-05
•
Expires: 1974-06-14
Abstract
No abstract record available.
Inventors
- 👤 William S Knowles
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 03:13
CPC Classifications
C; C07; C07J; C07J73/00; C07J75/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
18 words
A MEMBER OF THE GROUP CONSISTING OF THE ALKYL ESTER OF 1 - (N-CARBOXYETHYL)-2-KETO-6,7-DIHYDROXY-14-METHYL$9,11(1) -DECAHYDROPHENANTHRENE OF THE STRUCTURE
Claim 2
Dependent Claim
18 words
A MEMBER OF THE GROUP CONSISTING OF THE ALKYL ESTER OF 1 - (N-CARBOXYETHYL)-2-KETO-6,7-DIHYDROXY-14-METHYL$9,11(1) -DECAHYDROPHENANTHRENE OF THE STRUCTURE
References Cited (Backward Citations)
US2672482A
Cited
US2681366A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-08-04 | 1962-02-03 | 1962-08-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-08-04 | 1966-02-03 | 1966-08-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-08-04 | 1970-02-03 | 1970-08-05 | $7700.00 | Window Closed / Lapsed |