Highly reactive hydraulic binder for the preparation of building, construction and raw materials
CA 2010351 C · Owner: Burge, Theodor A. · Inventors: Bodenmann, Eugen; Burge, Theodor A.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The inventive highly reactive hydraulic binder for the preparation of building construction and, raw materials contains burned oil shale and at least one compound, selected from the group, consisting of - an amorphous oxide of 3- and/or 4-valent cations, - an amorphous hydroxide of 3- and/or 4valent cations, and, - an aluminate of 1- and/or 2-valent cations as well as, at least one water reducing agent.
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 February 19, 1990 and granted October 8, 1996. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended February 19, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 19, 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.