Resin-based articifial marble compositions
CA 2064049 C · Owner: Alcan Chemicals Limited · Inventors: Ishizaki, Masashi; Ohkawa, Shigeyo; Ohkawa, Jun
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention provides resin-based compositions with an improved hot waterresistance, which can be cast to give marblelike articles usable as bath tubs, kitchen work surfaces wash hand basins or , the like. The resin-based compositions of the invention are composed of (A) an unsaturated polyester resin component comprising an unsaturated polyester and a polymerizable unsaturated monomer and (B) a silane coupling agent-coated aluminium hydroxide component, in a specifically defined proportion.
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 July 19, 1990 and granted September 25, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended July 19, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 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.