Last Updated: September 24, 2026

Details for Patent: 3,927,046

Name: Drug Patent Intelligence for US Patent 3927046
Creator: DrugPatentWatch
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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 R1 ANGLE C= , R2 wherein R1 and R2 are hydrogen or an alkyl group having 1-2 C-atoms, and to processes for their preparation.
Inventor(s):	Den Broek Albertus Joannes Van
Assignee:	Akzona Inc
Application Number:	US420823A
Patent Claim Types: see list of patent claims	Compound;

Drugs Protected by US Patent 3,927,046

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Applicant	Tradename	Generic Name	Dosage	NDA	Approval Date	TE	Type	RLD	RS	Patent No.	Patent Expiration	Product	Substance	Delist Req.	Patented / Exclusive Use	Submissiondate
>Applicant	>Tradename	>Generic Name	>Dosage	>NDA	>Approval Date	>TE	>Type	>RLD	>RS	>Patent No.	>Patent Expiration	>Product	>Substance	>Delist Req.	>Patented / Exclusive Use	>Submissiondate

Foreign Priority and PCT Information for Patent: 3,927,046

Foriegn Application Priority Data
Foreign Country	Foreign Patent Number	Foreign Patent Date
Netherlands	7216767	Dec 9, 1972
Netherlands	7315704	Nov 15, 1973

International Family Members for US Patent 3,927,046

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Country	Patent Number	Estimated Expiration	Supplementary Protection Certificate	SPC Country	SPC Expiration
Austria	367067	⤷ Start Trial
Austria	A1032373	⤷ Start Trial
Australia	6326373	⤷ Start Trial
Belgium	808391	⤷ Start Trial
Canada	1021318	⤷ Start Trial
Switzerland	614453	⤷ Start Trial
>Country	>Patent Number	>Estimated Expiration	>Supplementary Protection Certificate	>SPC Country	>SPC Expiration

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