Patent US2767162A successfully refreshed from Google Patents.
US2767162A
Expired / Lapsed
US
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Glycolyl derivatives of 1, 12-dimethylpolyhydrophenanthrene-1-carboxylic acid esters
Assignee: GD Searle LLC
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Filing: 1953-11-23
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Granted: 1956-10-16
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Expires: 1973-11-23
Abstract
No abstract record available.
Inventors
- 👤 George M Picha
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 14:57
CPC Classifications
C; C07; C07C; C07C65/00; C07C65/21; C07C65/24; C07C65/26; C07C2603/00; C07C2603/02; C07C2603/04; C07C2603/22; C07C2603/26
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
59 words
A LOWER ALKYL ESTER OF A 1,12-DIMETHYLPOLYHYDROPHENANTHRENE-1-CARABOXYLIC ACID WHICH IS UNSATURATED IN THE RING FORMED BY CARBON ATOMS 5,6,8,14 AND 13, WHICH IS SUBSTITUTED IN THE SAID RING BY A MEMBER OF THE CLASS CONSISTING OF 6-(LOWER) ALKOXY, 6-HYDROXY-7-METHYL AND 7-ISOPROPYL RADICALS AND CONTAINS ATTACHED TO ONE OF AND CARBONS 6 AND 7 A RADICAL OF THE STRUCTURE FORMULA
Claim 2
Dependent Claim
59 words
A LOWER ALKYL ESTER OF A 1,12-DIMETHYLPOLYHYDROPHENANTHRENE-1-CARABOXYLIC ACID WHICH IS UNSATURATED IN THE RING FORMED BY CARBON ATOMS 5,6,8,14 AND 13, WHICH IS SUBSTITUTED IN THE SAID RING BY A MEMBER OF THE CLASS CONSISTING OF 6-(LOWER) ALKOXY, 6-HYDROXY-7-METHYL AND 7-ISOPROPYL RADICALS AND CONTAINS ATTACHED TO ONE OF AND CARBONS 6 AND 7 A RADICAL OF THE STRUCTURE 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) | 1959-10-16 | 1960-04-16 | 1960-10-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-10-16 | 1964-04-16 | 1964-10-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-10-16 | 1968-04-16 | 1968-10-16 | $7700.00 | Window Closed / Lapsed |