Pipe coupling arrangement
CA 2079843 A1 · Owner: Hattori, Takamasa · Inventors: Hattori, Takamasa
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A pipe coupling arrangement wherein a coupling body is fitted on at least one of a pair of pipes to connect the pipes with one another comprising a protruded portion formed on the outer periphery of each of the pipes, an annular sleeve having an inner wall therein being engageable with the protruded portion the sleeve, provided in a space between the outer periphery of the pipe and the inner periphery of the coupling body, a threaded hole being inwardly and slantingly formed in the coupling body closer to one end thereof for arresting the slipping off of the sleeve from the coupling body, a cut-away face being formed on the outer periphery of the sleeve, the cut-away face having a tilt …
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 5, 1992. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended October 5, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 5, 2014.
- 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.