Coprocessed microcrystalline cellulose and calcium carbonate composition and its preparation
Patent 4744987 Issued on May 17, 1988. Estimated Expiration Date: 
August 3, 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.
August 3, 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 2574210 2599091 2978446 3146168 3539365 3827899 Novel excipient and pharmaceutical composition containing the same Solidified emulsifiable concentrate and method for application thereof Articles having an insulative coating containing kaolin and staple fibers Readily hydratable cellulose and preparation thereof InventorsAssigneeApplicationNo. 07/081584 filed on 08/03/1987US Classes:424/687, Calcium carbonate106/204.01, With element or inorganic compound except water424/500, Contains natural gums and resins514/781Cellulose or derivativeExaminersPrimary: Griffin, Ronald W.Attorney, Agent or FirmInternational ClassA61K 9/20 (20060101)AbstractA particulate coprocessed microcrystalline cellulose and calcium carbonate composition having the respective components present in a weight ratio of from about 75:25 to 35:65. The composition is useful as a pharmaceutical excipient.The coprocessed composition is prepared by forming a well-dispersed aqueous slurry of microcrystalline cellulose and calcium carbonate and then drying the slurry, preferably by spray drying, to yield a particulate product.Other References
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