A high density artificial stone and a method for producing therefor
CA 2109549 C · Owner: Inoue, Yukihiko · Inventors: Inoue, Yukihiko
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention provides high density artificial stone with physical properties similar to those of natural stone and having excellent and beautiful external appearance as well as a method to produce same. More particularly the present invention provides high density artificial stone consisting of 10 to 70 mesh inorganic fine particles from natural stone and the like which are mixed with 100 mesh or above inorganic very fine particles to the weight ratio ranging from 0.5 : 1 to 5 : 1 jointly accounting for at least 85 % of the weight of the final product containing 15 % or less resins, wherein each raw material component is uniformly distributed and the fine particles from natural …
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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 19, 1993 and granted January 16, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended November 19, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 19, 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.