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US4170710A
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Prostaglandin derivatives
Assignee: Wyeth LLC
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Filing: 1977-10-17
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Granted: 1979-10-09
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Expires: 1997-10-17
Abstract
Abstract Prostaglandin compounds substituted at the 11-position, and possessing bronchodilating and hypotensive activity are prepared from PGA 2 and its esters and 15-epimers.
Inventors
- 👤 Donald P. Strike
- 👤 Wenling Kao
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 17:46
CPC Classifications
C; C07; C07D; C07D317/00; C07D317/08; C07D317/72; C07C; C07C405/00; C07C405/0008; C07C405/0033
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
21 words
A compound of the formula: ##STR25## wherein R 2 is hydroxy or acetoxy and R 3 is hydrogen or lower alkyl.
Claim 2
Dependent Claim
21 words
A compound of the formula: ##STR25## wherein R 2 is hydroxy or acetoxy and R 3 is hydrogen or lower alkyl.
Claim 3
Dependent Claim
16 words
The compound according to claim 1 wherein R 2 is hydroxy and R 3 is hydrogen.
References Cited (Backward Citations)
US4057571A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-10-08 | 1983-04-09 | 1983-10-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-10-08 | 1987-04-09 | 1987-10-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-10-08 | 1991-04-09 | 1991-10-09 | $7700.00 | Window Closed / Lapsed |