Catalyst filter, method for producing the same and method for treating exhaust gas with the same
CA 2358277 A1 · Owner: Koike, Hironobu · Inventors: Sugiyama, Hirofumi; Horaguchi, Mitsuhiro; Koike, Hironobu
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A catalyst filter comprising titania catalyst fiber and at least one layer of nonwoven fabric of polymer fiber which can, remove dust and nitrogen oxides from exhaust gas at the same time has a high catalytic activity and maintains the high catalytic activity even after vibrating the filter to shake off calcium hydroxide and dust.
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 October 3, 2001. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended October 3, 2021.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 3, 2023.
- 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.