US2736732A
Expired / Lapsed
US
⏱️ 0.0 years remaining
3,11-diketo-17-aldehyde-delta4,16-androstadiene and process
Assignee: Monsanto Chemicals Ltd
•
Filing: 1953-05-15
•
Granted: 1956-02-28
•
Expires: 1973-05-15
Abstract
No abstract record available.
Inventors
- 👤 William S Knowles
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 13:03
CPC Classifications
C; C07; C07J; C07J3/00; C07J75/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
3 words
3,11 -DIKETO-17-ADLDEHYDE-$ 4,16-ANDROSTADIENE.
Claim 2
Dependent Claim
3 words
3,11 -DIKETO-17-ADLDEHYDE-$ 4,16-ANDROSTADIENE.
References Cited (Backward Citations)
US2324881A
Cited
US2351637A
Cited
US2357364A
Cited
US2563247A
Cited
FR1052395A
Cited
US2681366A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-02-27 | 1959-08-29 | 1960-02-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-02-27 | 1963-08-29 | 1964-02-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-02-27 | 1967-08-29 | 1968-02-28 | $7700.00 | Window Closed / Lapsed |