Spherical linear polysaccharide-containing microparticles
CA 2302346 A1 · Owner: Schneller, Arnold · Inventors: Schneller, Arnold; Bohm, Gitte; Bengs, Holger
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention relates to microparticles having a uniform spherical shape and showing a very narrow dimensional distribution. These microparticles are fully or partly composed of a linear water insoluble polysaccharide preferably 1,4-, .alpha.-D-polyglucan, and they can contain other preferably biodegradable, polymers and/or active ingredients. They can inter alia, be used for the , controlled release of active ingredients. The are produced by dissolving the 1,4-.alpha.-D-polyglucan or said polysaccharide in a solvent mixing the , solution with a precipitating agent cooling the mixture and separating the formed particles.
Read the whole patent
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 August 20, 1998. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended August 20, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 20, 2020.
- 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.