Method for producing hollow structures and hollow structures
CA 1232461 A · Owner: Matiere, Marcel · Inventors: Matiere, Marcel
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention provides a method for producing cylindrical hollow structures or the like bearing on the ground along a generators having a cross-sectional shape with a flattened base, in particular large cross-sectional area conduits, which method produces structures having a high mechanical strength, and fabrication transportation, and installation costs considerably reduced with respect to current techniques.
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 February 9, 1988. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended February 9, 2005.
- 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.