Expired Canadian patentCanada
Tube for relining of pressure water pipelines
CA 1317898 C · Owner: Jarvenkyla, Jyri · Inventors: Jarvenkyla, Jyri; Johansson, Thomas
Overview
Drawings and full text
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A pipe of thermoplastic material for relining of pressure water pipelines is made as a finned pipe wherein the tensile strength of the pipe wall (1) is greater than the shear strength of the fins (2).
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 May 18, 1993. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended May 18, 2010.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledApril 27, 1989
GrantedMay 18, 1993
Term endedMay 18, 2010
Patent numberCA 1317898 C
Classification (IPC)F16L11/00 +1 more
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.