US2656349A
Expired / Lapsed
US
⏱️ 0.0 years remaining
14,15-oxides of the cyclopentanopolyhydrophenanthrene and polyhydrochrysene series
Assignee: CIBA PHARM PROD Inc
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Filing: 1950-12-04
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Granted: 1953-10-20
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Expires: 1970-12-04
Abstract
No abstract record available.
Inventors
- 👤 Ruzicka Leopold
- 👤 Plattner Placidus
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 12:45
CPC Classifications
C; C07; C07J; C07J71/00; C07J75/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
38 words
$16 - 14,15 - OXIDO - CYCLOPENTANOPOLYHYDROPHENANTHRENES CONTAINING IN 17-POSITION A MEMBER SELECTED FROM THE GROUP CONSISTING OF FREE CARBOXYL, CARBOXYL ESTERIFIED WITH A LOWER ALKANOL, FREE HYDROXYACETYL, HYDROXYACETYL ESTERIFIED WITH A LOWER ALKANOIC ACID, ACETYL AND CYANO.
Claim 2
Dependent Claim
38 words
$16 - 14,15 - OXIDO - CYCLOPENTANOPOLYHYDROPHENANTHRENES CONTAINING IN 17-POSITION A MEMBER SELECTED FROM THE GROUP CONSISTING OF FREE CARBOXYL, CARBOXYL ESTERIFIED WITH A LOWER ALKANOL, FREE HYDROXYACETYL, HYDROXYACETYL ESTERIFIED WITH A LOWER ALKANOIC ACID, ACETYL AND CYANO.
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) | 1956-10-19 | 1957-04-20 | 1957-10-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-10-19 | 1961-04-20 | 1961-10-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-10-19 | 1965-04-20 | 1965-10-20 | $7700.00 | Window Closed / Lapsed |