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Serving leading biopharmaceutical companies globally:


Generated: October 23, 2017

DrugPatentWatch Database Preview

Details for Patent: 5,798,338

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Summary for Patent: 5,798,338

Title: Solid dosage forms that contain clathrates of 17.alpha.-ethinyl estradiol
Abstract:A method and pharmaceutical compositions are disclosed for reducing oxidative degradation of 17 .alpha.-ethinylestradiol comprising combining the estradiol with an effective amount of cyclodextrin, thus forming a cyclodextrin clathrate of the steroid.
Inventor(s): Backensfeld; Thomas (Berlin, DE), Tack; Johannes (Berlin, DE)
Assignee: Schering Aktiengesellschaft (Berlin, DE)
Application Number:08/765,823
Patent Claim Types:
see list of patent claims
Composition; Use; Dosage form; Formulation;

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Foreign Priority and PCT Information for Patent: 5,798,338

Foriegn Application Priority Data
Foreign Country Foreign Patent Number Foreign Patent Date
Germany44 26 709.6Jul 20, 1994
PCT Information
PCT FiledJuly 10, 1995PCT Application Number:PCT/EP95/02656
PCT Publication Date:February 01, 1996PCT Publication Number: WO96/02277

International Patent Family for Patent: 5,798,338

Country Document Number Estimated Expiration Supplementary Protection Certificate SPC Country SPC Expiration
Canada2194979► Subscribe
Germany4426709► Subscribe
Germany59510887► Subscribe
Germany122007000011► Subscribe
Germany122007000013► Subscribe
Denmark0771217► Subscribe
Austria263578► Subscribe
European Patent Office0771217► SubscribeCA 2006 00038Denmark► Subscribe
European Patent Office0771217► Subscribe07C0001France► Subscribe
Spain2218561► 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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Serving leading biopharmaceutical companies globally:

Boehringer Ingelheim
Argus Health
Fish and Richardson
Express Scripts
Chinese Patent Office

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