Method for removal of nano-sized pathogens from liquids
CA 2374219 A1 · Owner: The Procter & Gamble Company · Inventors: Collias, Dimitris Ioannis; Tremblay, Mario Elmen; Fishter, Steve Gary
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Disclosed is a method of removing nano-sized pathogens including viruses, from a liquid, the method comprising contacting the liquid with a filter comprising activated carbon particles wherein said filter has a Pathogen Removal Index of at least about 99.99 %. Also disclosed is an article of manufacture comprising: (a) a filter comprising activated carbon particles wherein said filter has a Pathogen Removal Index of at least about 99.99 %; and (b) information which communicates to a user that the filter may be used to remove nano-sized pathogens from a liquid.
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 May 19, 2000. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended May 19, 2020.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 19, 2022.
- 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.