Boundry molding process, and mold for low pressure precision molding, with vapourisable model and binder-free sand

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

• Granted November 21, 1989. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended November 21, 2006.
• We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.