Controlled release pharmaceutical composition
Patent 4834985 Issued on May 30, 1989. Estimated Expiration Date: 
May 19, 2007. 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.
May 19, 2007. 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 References 2921883 3082154 3084294 3147187 3492397 3922339 Process of making a synthetic resin product containing a molecular inclusion compound in cyclodextrin Patent #: 4722815 InventorsAssigneeApplicationNo. 07/052585 filed on 05/19/1987US Classes:424/488, Polysaccharides (e.g., cellulose, etc.)424/457, Sustained or differential release424/458, Containing discrete coated particles pellets, granules, or beads424/468, Sustained or differential release type424/469, Discrete particles in supporting matrix424/484, Matrices424/490, Coated (e.g., microcapsules)424/494, Cellulose derivatives424/499, Contains proteins or derivative or polysaccharides or derivative424/502, Contains waxes, higher fatty acids, higher fatty alcohols514/58, Dextrin or derivative514/965, Discrete particles in supporting matrix514/971, Crystallization point depressant or cold stabilizer containing536/103Dextrin or derivativeExaminersPrimary: Page, Thurman K.Attorney, Agent or FirmInternational ClassA61K 9/20 (20060101)Foreign Application Priority Data1986-06-05 GBAbstractA solid, controlled release, pharmaceutical composition comprising an active ingredient incorporated in a matrix comprising a first substance selected from a water soluble polydextrose and a water soluble cyclodextrin and a second substance selected from a C12 -C36 fatty alcohol and a polyalkylene glycol.Preferably the first substance is a cyclodextrin, especially a beta-cyclodextrin, while the second substance is a C14 -C22 fatty alcohol, especially stearyl alcohol, cetyl alcohol, cetostearyl alcohol or myristyl alcohol. The matrix may also contain a cellulose ether, especially a hydroxyalkylcellulose or a carboxyalkylcellulose.Field of SearchNatural gums, resin or latexContaining waxes, higher fatty acids, higher fatty alcohols, or derivatives thereof Contains waxes, higher fatty acids, higher fatty alcohols Matrices Polysaccharides (e.g., cellulose, etc.) Sustained or differential release Containing discrete coated particles pellets, granules, or beads Sustained or differential release type Discrete particles in supporting matrix Coated (e.g., microcapsules) Cellulose derivatives Contains proteins or derivative or polysaccharides or derivative |
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