Adsorbent composition and method of producing same
CA 2073059 C · Owner: Mouri, Motoya · Inventors: Takeuchi, Tatsuro; Mouri, Motoya
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A precipitate composition comprising a water-insoluble phosphate of at least one metal selected from the group consisting of Ti, Zr and Sn, and a hydroxide of at least one metal selected from the group consisting of Fe, Co, Ni, Zn and Cu. The precipitate composition of the invention can be used as an adsorbent composition, which shows high adsorption capacity for acidic malodorous gases, such as hydrogen sulfide as well as alkaline malodorous , gases such as ammonia.
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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 November 28, 1990 and granted July 3, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended November 28, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 28, 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.