Microcapsules
CA 2443682 A1 · Owner: Bayer Cropscience Ag · Inventors: Podszun, Wolfgang; Probst, Joachim; Krueger, Joachim
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention relates to novel microcapsules that have a polyurethane and/or polyurea shell and a core from at least one solid active substance and that are further characterized in that the core contains no liquid. The invention further relates to a method for producing the novel microcapsules and to the use thereof for administering the active substances contained therein.
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 April 2, 2002. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended April 2, 2022.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 2, 2024.
- 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.