Prefabricated assembly for poured concrete forming structures
CA 2006575 C · Owner: Spera, Vittorio · Inventors: Spera, Vittorio
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
There is provided a modular assembly for poured concrete forming, comprising a plurality of interconnecting rigid panel members having a rear portion and front facing for contact with poured concrete to form a mold surface. The rear portion of the panel members provides at least two flanges extending generally rearwardly of the front facing, each of the flanges being longitudinally disposed respectively adjacent each of at least two opposed terminal edges of the panel members. Adjacent the front facing of the panel members, a stepped portion is provided at one of the terminal edges of the panels and, a corresponding protruding edge portion is provided at the other of its terminal edges …
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 22, 1989 and granted June 22, 1993. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended December 22, 2009.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 22, 2011.
- 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.