US3729502A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Prostanoic acid derivatives
Assignee: Pharmacia and Upjohn Co
•
Filing: 1970-10-16
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Granted: 1973-04-24
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Expires: 1990-10-16
Abstract
Abstract 1. A PROSTANOIC ACID DERIVATIVE OF THE FORMULA: 1-(CH3-CH2-Z-CH2-CH(-O-R2)-X-),4-(R4-O-),5-(R1-OOC-(CH2)3- Y-CH2-)CYCLOPENT-2-ENE WHEREIN X, Y, AND Z ARE -CH2CH2-, WHEREIN X IS TRANS-CH=CH-, AND Y AND Z ARE -CH2CH2-, OR WHEREIN X IS TRANS-CH=CH-, Y IS CIS-CH=CH-, AND Z IS -CH2CH2- OR CIS-CH=CH-, WHEREIN R1 IS HYDROGEN, LOWER ALKYL, OR A PHARMACOLOGICALLY ACCEPATABLE CATION, WHEREIN R2 AND R4 ARE EACH HYDROGEN OR LOWER ALKANOYL, WITH THE PROVISO THAT WHEN R4 IS LOWER ALKANOYL, R2 IS ALSO LOWER ALKANOYL, AND WHEREIN $ IS A GENERIC EXPRESSION DENOTING AN ALPHA OR A BETA CONFIGURATION FOR THE OR4 MOIETY.
Inventors
- 👤 P Beal
- 👤 J Pike
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 13:35
CPC Classifications
C; C07; C07C; C07C405/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
7 words
A PROSTANOIC ACID DERIVATIVE OF THE FORMULA:
Claim 2
Dependent Claim
7 words
A PROSTANOIC ACID DERIVATIVE OF THE 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) | 1976-04-23 | 1976-10-23 | 1977-04-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-04-23 | 1980-10-23 | 1981-04-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-04-23 | 1984-10-23 | 1985-04-24 | $7700.00 | Window Closed / Lapsed |