Hydraulic compositions and high-strength composite materials
CA 2031364 C · Owner: Kajikawa, Akira · Inventors: Kajikawa, Akira; Sakurai, Hiroshi; Murakado, Toru
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A hydraulic composition comprising blast furnace slag powder, a water-soluble polymer and an alkaline substance, and a high-strength composite material produced by kneading and molding a composition which comprises blast furnace slag powder, a water-soluble polymer, an alkaline substrate and water and wet curing, the molded composition. The high-strength composite material has high bending strength and excellent water resistance by using uncostly blast furnace slag powder.
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 December 3, 1990 and granted February 12, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended December 3, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 3, 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.