US2499247A
Expired / Lapsed
US
⏱️ 0.0 years remaining
2, 13 - dimethyldodecahydrophenanthrene hydroxy lactones and derivatives thereof
Assignee: GD Searle LLC
•
Filing: 1947-10-17
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Granted: 1950-02-28
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Expires: 1967-10-17
Abstract
No abstract record available.
Inventors
- 👤 Robert P Jacobsen
- 👤 Pincus Gregory
- 👤 Levy Harold
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 00:04
CPC Classifications
C; C07; C07D; C07D493/00; C07D493/12; C07D493/14
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
8 words
A NEW COMPOSITION OF MATTER HAVING THE FORMULA
References Cited (Backward Citations)
US2193674A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-02-27 | 1953-08-29 | 1954-02-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-02-27 | 1957-08-29 | 1958-02-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-02-27 | 1961-08-29 | 1962-02-28 | $7700.00 | Window Closed / Lapsed |