Suspension of sparingly water-soluble acidic drug
CA 2253260 A1 · Owner: Nakano, Hiroshi · Inventors: Nakano, Hiroshi; Tsunoda, Kenji; Naito, Mayumi
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A suspension of a sparingly water-soluble acidic drug especially a , nonsteroidal anti-inflammatory analgetic agent which is stable for a , prolonged period of time and is highly dissolvable; and a process for simply and easily producing the suspension. This suspension has a pH value of 2 to 5 and comprises a sparingly water-soluble acidic drug whose average particle size ranges from 1 to 15 µm, a polyglycerol fatty acid ester a water-, soluble polyhydric alcohol and water optionally, together with an inorganic powder having an average particle size of 1 to 15 µm. This process is characterized by carrying out pulverization and dispersion of sparingly watersoluble acid drug, a …
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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 May 1, 1997. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended May 1, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 1, 2019.
- 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.