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Generated: October 23, 2017

DrugPatentWatch Database Preview

Details for Patent: 5,681,588

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Summary for Patent: 5,681,588

Title: Delayed release microtablet of .beta.-phenylpropiophenone derivatives
Abstract:A cylindrical delayed release tablet with a convex or flat upper side and lower side is provided, along with a method for its production and a gelatin capsule containing 3-200 tablets of the same having identical or different release rates, wherein the tablet if made of .beta.-phenylpropiophenone derivatives of the formula I as active ingredient ##STR1## where R is n-propyl or 1,1-dimethylpropyl, and their pharmacologically acceptable salts, wherein the tablet has a height and diameter that are both, independently of one another, 1-3 mm, the active ingredient content is in the range from 81-99.9% of the weight of the microtablet, (but not taking into account the weight of any coating which is present, the active ingredient density is greater than 1, the release of active ingredient in the USP paddle method at 50 rpm is 80% as a maximum after 3 hours and as a minimum after 24 hours, the release rate is virtually independent of the pressure when compressing the tablets, and the tablet contains no release-delaying ancillary substance but can contain 0.1-5% by weight of a lubricant and 0-18.9% by weight of other conventional ancillary substances.
Inventor(s): Kolter; Karl (Limburgerhof, DE), Fricke; Helmut (Mutterstadt, DE), Buehler; Volker (Karlsruhe, DE), Mueller-Peltzer; Herbert (Heidelberg, DE)
Assignee: Knoll Aktiengesellschaft (Ludwigshafen, DE)
Application Number:08/525,749
Patent Claim Types:
see list of patent claims
Compound; Dosage form; Composition; Process;

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Foreign Priority and PCT Information for Patent: 5,681,588

Foriegn Application Priority Data
Foreign Country Foreign Patent Number Foreign Patent Date
Germany43 10 963.2Apr 03, 1993
PCT Information
PCT FiledMarch 24, 1994PCT Application Number:PCT/EP94/00949
PCT Publication Date:October 03, 1994PCT Publication Number: WO94/22434

International Patent Family for Patent: 5,681,588

Country Document Number Estimated Expiration Supplementary Protection Certificate SPC Country SPC Expiration
Finland114610► Subscribe
Canada2437412► Subscribe
China1120312► Subscribe
China1092957► Subscribe
Czech Republic9502465► Subscribe
Czech Republic284869► Subscribe
Germany4310963► Subscribe
Germany59401833► Subscribe
Denmark0691843► Subscribe
European Patent Office0691843► 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:

Johnson and Johnson
Cantor Fitzgerald
US Army
Federal Trade Commission

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