Granular anhydrous dicalcium phosphate compositions suitable for direct compression tableting
CA 1260226 A · Owner: Rhone-Poulenc Inc. · Inventors: Ertell, Carolyn A.; Gustafson, Carl G.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A granular anhydrous dicalcium phosphate having a particle of a size sufficient for direct compression tablets and a surface area of greater than 5 meters2/gram can be direct compression tableted. This product can be prepared by dehydrating granules of dicalcium phosphate dihydrate of a particle size sufficient for direct compression tableting and sufficiently large to allow the dehydration of the granules without lumping and without fracturing a majority of the granules. The granules are heated at a temperature sufficient to form anhydrous dicalcium phosphate. The product is a granular anhydrous dicalcium phosphate exhibiting good compressibility, flowability and whiteness while being in …
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Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.
Why it's free to use
- Granted September 26, 1989. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended September 26, 2006.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Timeline
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Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.