Method for preparing substituted 3,7-dihydroxy steroids
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United States of America Patent
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-
Jun 12, 2018
Issued Date -
N/A
app pub date -
Oct 19, 2015
filing date -
Jun 6, 2008
priority date (Note) -
In Force
status (Latency Note)
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Abstract
The invention relates to processes for preparing 17-alkynyl-7-hydroxy-steroids, such as 17-Ethynyl-10R,13S-dimethyl 2,3,4,7,8R,9S,10,11,12,13,14S,15,16,17-hexadecahydro-1H-cyclopenta[a]phenanthrene-3R,7R,17S-triol (also referred to as 17α-ethynyl-androst-5-ene-3β,7β,17β-triol), that are essentially free of process impurities having binding activity at nuclear estrogen receptors.
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International Classification(s)
- 2015 Application Filing Year
- C07J Class
- 136 Applications Filed
- 106 Patents Issued To-Date
- 77.95 % Issued To-Date
Cited Art Landscape
Patent Citation Ranking
- 0 Citation Count
- C07J Class
- 0 % this patent is cited more than
- 7 Age
Maintenance Fees
| Fee | Large entity fee | small entity fee | micro entity fee | due date |
|---|---|---|---|---|
| 7.5 Year Payment | $3600.00 | $1800.00 | $900.00 | Dec 12, 2025 |
| 11.5 Year Payment | $7400.00 | $3700.00 | $1850.00 | Dec 12, 2029 |
