Antimicrobial fiber, resin, and method for production thereof
CA 2028131 A1 · Owner: Nowatari, Hiroyoshi · Inventors: Nowatari, Hiroyoshi; Yamauchi, Yuji; Mouri, Tsuyoshi
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An antimicrobial fiber or resin of polyacrylonitrile or polyester containing 1 to 1,000 ppm, preferably 10 to 1,000 ppm, of silver in the form of silver sulfonate (2) a process for producing an antimicrobial fiber or resin of polyacrylonitrile or polyester, which comprises reacting a fiber or resin of polyacrylonitrile or polyester having sulfonic group and/or sulfonate group in the structure thereof with a water-soluble silver compound in water at a temperature not lower than the glass transition temperature of the polyacrylonitrile or the polyester (3) a process for producing an antimicrobial fiber or resin of polyacrylonitrile or polyester, which comprises reacting a fiber or resin of …
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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 March 7, 1990. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended March 7, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 7, 2012.
- 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.