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Details for Patent: 3,927,046

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Summary for Patent: 3,927,046

Title: Novel 11,11-alkylidene steroids
Abstract:The invention relates to novel 11,11-alkylidene steroids of the estrane and (19-nor-)pregnane series having a double bond starting from carbon atom 5, the alkylidene group in 11-position having the formula ##EQU1## wherein R.sub.1 and R.sub.2 are hydrogen or an alkyl group having 1-2 C-atoms, and to processes for their preparation. The novel compounds have very interesting biological activities, such as anabolic, androgenic, estrogenic, progestative, anti-androgenic, anti-oestrogenic, ovulation-inhibiting and gonad-inhibiting activities.
Inventor(s): van den Broek; Albertus Joannes (Oss, NL)
Assignee: Akzona Incorporated (Asheville, NC)
Application Number:05/420,823
Patent Claim Types:
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Foreign Priority and PCT Information for Patent: 3,927,046

Foriegn Application Priority Data
Foreign Country Foreign Patent Number Foreign Patent Date
Netherlands7216767Dec 9, 1972
Netherlands7315704Nov 15, 1973

International Patent Family for Patent: 3,927,046

Country Document Number Estimated Expiration Supplementary Protection Certificate SPC Country SPC Expiration
AustriaA1032373► subscribe
Austria367067► subscribe
Australia6326373► subscribe
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The estimated expiration dates shown above are derived by simply adding 20 years to the priority date.
Due to the complexity of determining patent expirations even in a single country, compounded by the diversity of global patent laws, it is advisable to have patent counsel verify freedom to operate.

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