Substrates with biocidal properties and process for making them
CA 2363007 A1 · Owner: Roberts, George · Inventors: Roberts, George; Blowes, Phillip Charles; Taylor, Alan John
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention relates to a process for treating a substrate to impart biocidal properties to the substrate by depositing or impregnating the substrate with solubilised chitosan, immersing the substrate in a solution of a silver salt treating the substrate to reduce the silver salt to atomic/metallic silver cross-linking the chitosan and washing the resultant treated substrate. The invention also relates to biocidal substrates when prepared by this process and to the use of such biocidal substrates for the manufacture of garments dressings and protective drapes suitable for medical and veterinary use.
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 February 21, 2000. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended February 21, 2020.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 21, 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.