Patent US2755289A successfully refreshed from Google Patents.
US2755289A
Expired / Lapsed
US
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Anhydro derivatives of 2, 4b-dimethyl-2-hydroxy-4, 7-dioxo-1, 2, 3, 4, 4a, 4b, 5, 6,7, 9, 10, 10a-dodecahydrophenanthrene-1-propionic acid
Assignee: GD Searle LLC
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Filing: 1955-03-17
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Granted: 1956-07-17
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Expires: 1975-03-17
Abstract
No abstract record available.
Inventors
- 👤 George M Picha
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 19:04
CPC Classifications
C; C07; C07C; C07C59/00; C07C59/40; C07C59/76; C07C59/80; C07C59/82; C07C59/90; C07C2603/00; C07C2603/02; C07C2603/04; C07C2603/22; C07C2603/26
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
10 words
A MONOANHYDRO-2,4B-DIMETHYL-2-HYDROXY-4,7-DIOXO1,2,3,4,4A,4B,5,6,7,9,10,10A -DODECAHYDROPHENANTHRENE-1 PROPIONIC ACID HAVING THE EMPIRICAL FORMULA C19H24O4.
Claim 2
Dependent Claim
10 words
A MONOANHYDRO-2,4B-DIMETHYL-2-HYDROXY-4,7-DIOXO1,2,3,4,4A,4B,5,6,7,9,10,10A -DODECAHYDROPHENANTHRENE-1 PROPIONIC ACID HAVING THE EMPIRICAL FORMULA C19H24O4.
Claim 3
Dependent Claim
6 words
A COMPOUND HAVING THE STRUCTURAL FORMULA
Claim 4
Dependent Claim
6 words
A COMPOUND HAVING THE STRUCTURAL FORMULA
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-07-17 | 1960-01-16 | 1960-07-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-07-17 | 1964-01-16 | 1964-07-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-07-17 | 1968-01-16 | 1968-07-17 | $7700.00 | Window Closed / Lapsed |