Toughened polyethylene terephthalate
CA 2944579 C · Owner: Terrasimco Inc. · Inventors: Simmons, Walter John; Simmons, Walter Neal
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A composite material is disclosed having a matrix formed of polyethylene terephthalate , and cement particles distributed in the matrix. The cement particles may be Portland cement. , About 50 wt % or less of the composite material is cement particles. The cement particles have , an average particle size of no more than about 100 µm.
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 16, 2004 and granted April 7, 2020. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended December 16, 2024.
- Certificates of supplementary protection extend only drug patents, and it isn't classified as one.
- 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.