Pharmaceutical excipient having improved compressibility
CA 2183882 C · Owner: Edward Mendell Co. Inc. · Inventors: Sherwood, Bob E.; Hunter, Edward A.; Staniforth, John N.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A microcrystalline cellulose-based, excipient having improved compressibility whether utilized in direct compression. Figure graphically shows a comparison of the tensile strength of tablets prepared in accordance with the invention and prior art tablets. Dry granulation or wet granulation formulations is disclosed. The excipient is an agglomerate of microcrystalline cellulose particles and an effective amount of a surfactant, which in preferred embodiments is an anionic surfactant present in amounts ranging from about 0.1% to about 0.5 %, by weight of the microcrystalline cellulose, wherein the microcrystalline cellulose and surfactant are in intimate association with each other. One …
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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
- Filed January 5, 1996 and granted August 22, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended January 5, 2016.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 5, 2018.
- 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
Timeline From CIPO dates
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.