Improvements in filtration
CA 2048621 A1 · Owner: Keogh, Boyd T. · Inventors: Keogh, Boyd T.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A system for the treatment or treatment and retreatment of contaminated fluid waste (e.g. Figs. 3 4, 5 and 6), comprising a, source or reservoir of contaminated waste (4) linked to a fluid discharge or circulation network of pipes means (5) in the network, for urging the contaminated fluid waste through the network characterised in that the treatment and retreatment is effected by the insertion into the said network of at least one receptacle or housing (1) adapted to receive therein a preselected blend (3') of at least a carbonaceous powder, a first adsorptive fibrous material and a second adsorptive fibrous material to form a cartridge (2) which is permeable to the said fluid. The …
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 March 5, 1990. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended March 5, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 5, 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.