Last Updated: August 10, 2026

Details for Patent: 5,798,338

Name: Drug Patent Intelligence for US Patent 5798338
Creator: DrugPatentWatch
License: https://www.drugpatentwatch.com/terms.php

✉ Email this page to a colleague

« Back to Dashboard

Summary for Patent: 5,798,338

Title:	Solid dosage forms that contain clathrates of 17α-ethinyl estradiol
Abstract:	A method and pharmaceutical compositions are disclosed for reducing oxidative degradation of 17 α-ethinylestradiol comprising combining the estradiol with an effective amount of cyclodextrin, thus forming a cyclodextrin clathrate of the steroid.
Inventor(s):	Thomas Backensfeld, Johannes Tack
Assignee:	Bayer Pharma AG
Application Number:	US08/765,823
Patent Claim Types: see list of patent claims	Use; Composition; Formulation; Dosage form;
Patent landscape, scope, and claims:	error: insufficient information More… ↓ ⤷ Start Trial

Drugs Protected by US Patent 5,798,338

Glossary

Subscribe to access the full database, or Start Trial
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: 5,798,338

Foriegn Application Priority Data
Foreign Country	Foreign Patent Number	Foreign Patent Date
Germany	44 26 709.6	Jul 20, 1994

PCT Information
PCT Filed	July 10, 1995	PCT Application Number:	PCT/EP95/02656
PCT Publication Date:	February 01, 1996	PCT Publication Number:	WO96/02277

International Family Members for US Patent 5,798,338

Subscribe to access the full database, or Start Trial
Country	Patent Number	Estimated Expiration	Supplementary Protection Certificate	SPC Country	SPC Expiration
European Patent Office	0771217	⤷ Start Trial	CA 2006 00038	Denmark	⤷ Start Trial
European Patent Office	0771217	⤷ Start Trial	07C0001	France	⤷ Start Trial
Austria	263578	⤷ Start Trial
Canada	2194979	⤷ Start Trial
>Country	>Patent Number	>Estimated Expiration	>Supplementary Protection Certificate	>SPC Country	>SPC Expiration

Make Better Decisions: Try a trial or see plans & pricing

Drugs may be covered by multiple patents or regulatory protections. All trademarks and applicant names are the property of their respective owners or licensors. Although great care is taken in the proper and correct provision of this service, thinkBiotech LLC does not accept any responsibility for possible consequences of errors or omissions in the provided data. The data presented herein is for information purposes only. There is no warranty that the data contained herein is error free. We do not provide individual investment advice. This service is not registered with any financial regulatory agency. The information we publish is educational only and based on our opinions plus our models. By using DrugPatentWatch you acknowledge that we do not provide personalized recommendations or advice. thinkBiotech performs no independent verification of facts as provided by public sources nor are attempts made to provide legal or investing advice. Any reliance on data provided herein is done solely at the discretion of the user. Users of this service are advised to seek professional advice and independent confirmation before considering acting on any of the provided information. thinkBiotech LLC reserves the right to amend, extend or withdraw any part or all of the offered service without notice.