Dosage form for delivering acetaminophen or phenylpropanolamine
Patent 4915953 Issued on April 10, 1990. Estimated Expiration Date: 
February 21, 2009. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
February 21, 2009. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent ReferencesDispenser with diffuser Simultaneous delivery of two drugs from unit delivery device Osmotic drug delivery system Can crushing machine Means for providing instant agent from agent dispensing system Dosage form comprising fast agent delivery followed by slow agent delivery Patent #: 4814181 InventorsAssigneeApplicationNo. 312556 filed on 02/21/1989US Classes:424/473, With porous, perforated, apertured, or sieved layer (e.g., dialyzing layer, microporous layer, etc.)424/467, Printed, embossed, grooved, or perforated424/472Layered unitary dosage formsExaminersPrimary: Swisher, Nancy A. B.Attorney, Agent or FirmInternational ClassA61K 009/24AbstractA dosage form is disclosed comprising a wall that surrounds a compartment with an exit means in the wall. The compartment comprises a first or fast releasing lamina and a second or short releasing lamina that are delivered through the exit means over two different periods of time.Field of SearchPrinted, embossed, grooved, or perforatedPlural concentric cores Where particles are granulated Sustained or differential release type Layered unitary dosage forms With porous, perforated, apertured, or sieved layer (e.g., dialyzing layer, microporous layer, etc.) Discrete particles in supporting matrix | |
