A filter device
CA 2180139 A1 · Owner: Intercator Ab · Inventors: Brusell, Tommy; Retzell, Arne
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
This invention relates to a filter device for filtration of ventilation air in buildings and dust separation in industrial process air comprising a filter frame and a filter module insertable in the frame. According to the invention the filter device is characterized in that the filter frame (1) is made of a biological fibre material and that the filter module (2) comprises a biological fibre material containing flax and/or cotton and/or wool, whereby the filter device is possible to destruct without any harmful influence on the environment.
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 25, 1994. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended November 25, 2014.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 25, 2016.
- 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.