Fixing agent for fixing organic and inorganic impurities containing material, method for fixing such material and a synthetic clay material
CA 2090666 C · Owner: Pelt & Hooykaas B.V. · Inventors: Hooykaas, Carel Willem Jan
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention relates to a fixing agent for fixing, organic and inorganic impurities containing material which, comprises an organophilic clay material and a clay-growth agent. The clay-growth agent comprises at least one magnesium compound and/or at least one aluminium compound and an initiator for clay formation. This initiator is a silicon-containing material, such as a glass or a silicon-containing rock, such as pumice basalt or, andasite. The magnesium compound preferably originates from granulated blast furnace slags, or is magnesium oxide whereas the aluminium compound is expediently aluminium oxide or an alumina containing material. An oxidising agent can also be present. A method …
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 1, 1993 and granted October 27, 1998. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended March 1, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 1, 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.