Compressed tablets for disintegration in the colon comprising an active ingredient containing nucleus coated with a first layer containing microcrystalline cellulose which is coated with an enteric organic polymer coating
Patent 4432966 Issued on February 21, 1984. Estimated Expiration Date: 
August 31, 2002. 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.
August 31, 2002. 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 ReferencesInventorsAssigneeApplicationNo. 06/413483 filed on 08/31/1982US Classes:424/477, Containing proteins or derivatives thereof424/471, Plural concentric cores424/480, Cellulose or derivative424/482Containing solid synthetic polymersExaminersPrimary: Rose, Shep K.Attorney, Agent or FirmInternational ClassA61K 9/28 (20060101)Foreign Application Priority Data1980-12-08 FRAbstractCoated compressed tablets for oral administration are disclosed which substantially desintegrate specifically at the level of the colon. The tablets comprise a compressed center piece containing an active agent which center piece is coated by a first coating layer which is comprised of a mixture of a pharmaceutically acceptable film-forming organic polymer material which is non-deteriorated by a neutral or alkaline aqueous medium and microcrystalline cellulose and a second coating layer which is comprised of a pharmaceutically acceptable enteric organic polymer coating material. | |
