Prevention of irreversible aggregation of viable microorganisms upon drying
CA 2254431 A1 · Owner: Philom Bios Inc. · Inventors: Zhu, Hong
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method and composition are described for preventing irreversible aggregation of viable microorganisms which exhibit aggregative activity upon drying. The method comprises dispersing the microorganisms in an aqueous polymer solution containing a water-soluble or water-dispersable low molecular weight polymer such that the polymer solution inhibits direct surface contact between the individual microorganisms. The polymer solution containing the dispersed microorganisms is then dried to form a dry continuous polymer matrix containing the dispersed microorganisms. This dry continuous polymer matrix is adapted to substantially totally dissolved within five minutes in cold or room temperature …
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 November 24, 1998. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended November 24, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 24, 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.