Last Updated: September 25, 2026

Details for Patent: 4,904,650

Name: Drug Patent Intelligence for US Patent 4904650
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Summary for Patent: 4,904,650

Title:	Substituted androsta-1,4-diene-3,17-diones
Abstract:	The invention relates to 6-alkylidenadrosta-1,4-diene-3,17-dione derivatives, having the following general formula ##STR1## wherein each of R and R2, independently, is hydrogen or C1 -C6 alkyl and R1 is hydrogen, halogen or C1 -C6 alkyl, which are useful in therapy, in particular in the treatment of hormone-dependent cancers.
Inventor(s):	Franco Buzzetti, Natale Barbugian, Paolo Lombardi, Enrico DI Salle
Assignee:	Pfizer Italia SRL
Application Number:	US07/225,674
Patent Claim Types: see list of patent claims	Use; Composition;

Drugs Protected by US Patent 4,904,650

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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: 4,904,650

Foriegn Application Priority Data
Foreign Country	Foreign Patent Number	Foreign Patent Date
United Kingdom	8517360	Jul 09, 1985

International Family Members for US Patent 4,904,650

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Country	Patent Number	Estimated Expiration	Supplementary Protection Certificate	SPC Country	SPC Expiration
Austria	395157	⤷ Start Trial
Austria	A181986	⤷ Start Trial
Australia	578840	⤷ Start Trial
Australia	5979986	⤷ Start Trial
Bosnia and Herzegovina	97185	⤷ Start Trial
Belgium	905067	⤷ Start Trial
Bulgaria	61370	⤷ Start Trial
>Country	>Patent Number	>Estimated Expiration	>Supplementary Protection Certificate	>SPC Country	>SPC Expiration

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