Interconnectable formwork elements
CA 2215939 C · Owner: Piccone, Francesco · Inventors: Piccone, Francesco
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A modular assembly for creating formwork for casting vertical concrete structures is characterized by elongated generally concave elements (1) which , are disposed in edge to edge relationship in two facing rows (4 5 and 6, 7), and which are simultaneously retained in edge to edge relationship and in facing relationship by connecting members (8). The connecting members have spaced ribs (18) allowing the flow of concrete across the plane of the connecting member (8).
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 May 11, 1995 and granted August 24, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended May 11, 2015.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 11, 2017.
- 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.