Die-cuttable acrylic sheet
CA 2521583 C · Owner: Arkema · Inventors: Cohen, Leslie A.; Garcia-Leiner, Manuel A.; Grimes, Elizabeth E.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention relates to an acrylic sheet that can be die-cut without cracking yet has low temperature impact resistance and good weatherability. Specifically the acrylic sheet is an impact modified copolymer having a matrix with a Tg of between 70 and 86°C. In a preferred embodiment the matrix is a copolymer of methyl methacrylate and from 12 to 18 percent by weight of ethyl acrylate.
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 September 29, 2005 and granted July 30, 2013. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended September 29, 2025.
- 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.