Building foundation form work
CA 1294144 C · Owner: Leonardis, Nicola · Inventors: Leonardis, Nicola
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A building foundation form work arrangement in which a plurality of boxes 1 are located on a supporting level surface and are kept apart to leave channels 4 between the boxes 1 and, spacers 22 engaging respective sides of each of the corners of the boxes 1 so as to hold these in position against substantial lateral dislodgement forces when concrete is poured into the channels 4.
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 January 14, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended January 14, 2009.
- 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.