Hollow fiber membrane and braided tubular support therefor
CA 2377255 A1 · Owner: Zenon Environmental Inc. · Inventors: Goodboy, Kenneth Paul; Mahendran, Mailvaganam; Fabbricino, Luigi
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An asymmetric membrane comprising a tubular polymer film in combination with a tubular braid on which the film is supported requires the braid be , macroporous and flexible yet sufficiently strong to withstand continuous flexing, stretching and abrasion during use for microfiltration (MF) or ultrafiltration (UF). The specifications for a braid of a long-lived membrane are provided. A membrane is formed by supporting a polymer film in which particles of calcined .alpha.-alumina are dispersed on the defined tubular , braid.
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 June 1, 2000. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended June 1, 2020.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 1, 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.