Heated stripper shoe assembly
CA 2060934 C · Owner: Woolford, Michael E. · Inventors: Woolford, Michael E.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention is a heated stripper shoe assembly for use in manufacture of concrete masonry blocks. The heated stripper shoe has a stripper shoe plate at least one heat, block and at least one heat element fitted within the heat block. Optionally, the stripper shoe assembly may also comprise a heat shroud positioned over the heat block on the upper surface of the stripper shoe plate a standoff attached, to the heat shroud for affixing the assembly to a block machine, and a mold for use with the stripper shoe assembly. The invention also comprises methods of using the assembly.
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 February 10, 1992 and granted December 28, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended February 10, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 10, 2014.
- 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.