Flexible Flat-Rate Plans

Flat-rate pricing for predictable budgeting

Short-term plans for project- or client-based billing

► Plans and Pricing

Upgrade to enjoy subscriber-only features like email alerts and data export. See the Plans and Pricing

DrugPatentWatch Database Preview

Details for Patent: 4,721,619

« Back to Dashboard

Summary for Patent: 4,721,619

Title: Controlled absorption diltiazen pharmaceutical formulation
Abstract:A controlled absorption diltiazem formulation for oral administration comprises a pellet having a core of diltiazem or a pharmaceutically acceptable salt thereof in association with an organic acid and a lubricant, and an outer membrane which permits release of diltiazem in an aqueous medium at a controlled rate which is substantially pH independent. The pellet has a dissolution rate in vitro, which when measured according to the Paddle Method of U.S. Pharmacopoeia XX, is not more than 10% of the total diltiazem after 2 hours of measurement in a buffered medium. Not more than 30% of the total diltiazem is released after a total of 4 hours measurement and not more than 40% of the total diltiazem is released after a total of 6 hours. 100% release is achieved after 12 hours, with a maximum of 80% of the total diltiazem being released after 8 hours.
Inventor(s): Panoz; Donald E. (Whale Bay, BM), Geoghegan; Edward J. (Athlone, IE)
Assignee: Elan Corporation p.l.c. (IE)
Application Number:06/684,661
Patent Claim Types:
see list of patent claims
Composition; Formulation; Compound; Dosage form;

No matches for this query

Foreign Priority and PCT Information for Patent: 4,721,619

Foriegn Application Priority Data
Foreign Country Foreign Patent Number Foreign Patent Date
Ireland3057/83Dec 22, 1983

International Patent Family for Patent: 4,721,619

Country Document Number Estimated Expiration Supplementary Protection Certificate SPC Country SPC Expiration
European Patent Office0149920<disabled in preview>
European Patent Office0320097<disabled in preview>
European Patent Office0856313<disabled in preview>
This preview shows a limited data set
Subscribe for full access, or try a Trial

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.

Export unavailable in trial.
Subscribe for complete access.

For more information try a trial or see the database preview and plans and 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. thinkBiotech performs no independent verifification 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.