US3721687A
Expired / Lapsed
US
⏱️ 0.0 years remaining
3-keto-delta 4-9alpha-halo-11-oxygenated-16-methyl or methylene-17alpha-acyloxy-20-keto-21-halo pregnenes
Assignee: Glaxo Laboratories Ltd
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Filing: 1970-06-08
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Granted: 1973-03-20
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Expires: 1990-06-08
Abstract
Abstract ANTI-INFLAMMATORY STERIODS OF THE FORMULA 9-Y,11-X,16-R3,17-(R2-O-),17-(R1-CH2-CO-)ANDROST-4-EN- WHEREIN R1 IS A FLUORINE, CHLORINE, BROMINE OR IODINE ATOM, R2 IS AN ALKANOXY GROUP CONTAINING 1-4 CARBON ATOMS, R3 IS AN ALKYL GROUP CONTAINING 1-4 CARBON ATOMS OR A METHYLENE GROUP (=CH2), X IS A HYDROXY GROUP IN THE B-CONFIGURATION OR A KETO GROUP, Y IS A FLUORINE OR CHLORINE ATOM, AND = REPRESENTS A SINGLE OR DOUBLE BOND BETWEEN THE 1AND 2-POSITIONS OF THE MOLECULE. 3-ONE
Inventors
- 👤 P May
- 👤 J Elks
- 👤 G Phillipps
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 11:04
CPC Classifications
A; A61; A61K; A61K31/00; A61K31/56; A61K31/57; A61K31/573; C; C07; C07J; C07J5/00; G; G02; G02B; G02B7/00; G02B7/20; G02B7/22
Claims Analysis
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References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-03-19 | 1976-09-18 | 1977-03-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-03-19 | 1980-09-18 | 1981-03-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-03-19 | 1984-09-18 | 1985-03-20 | $7700.00 | Window Closed / Lapsed |