Method of producing sorbents on smectite basis
CA 2111914 A1 · Owner: Hahn, Reinhard · Inventors: Hahn, Reinhard; Haubensak, Otto
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A process for production of sorbents based on smectite for uptake of liquids is described. This process is characterized in that: (a) a smectite with a water uptake capacity of less than 115% (in terms of the dried smectite with a residual water content of 6 wt.%) and a smectite content of around 40-65 wt.% and/or, (b) a two-sheet silicate in the moist condition is mixed and homogenized with an alkaline smectite by intensive sheating, the mixture is gently dried, and the dried mixture is fragmented.
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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 December 20, 1993. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended December 20, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 20, 2015.
- 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.