Pipe connections
CA 2001066 C · Owner: Irwin, William James · Inventors: Irwin, William James
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method of and means for making pipe-to-pipe connections in which the pipes (10) are provided with socket ends (12) and with spigot ends (14) for mating with the socket ends (12) of pipes to be connected therewith. Each socket end (12) being provided with an annular portion (16) of increased diameter. The socket ends (12) are of malleable material capable of being crimped around a spigot end (14) of the mated pipe (10). An annular element (18) is provided within the pipe connection. The element (18) is an olive desirably positioned in the inside of the annular portion (16).
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 October 19, 1989 and granted July 13, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended October 19, 2009.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 19, 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.