Pipe made of rigid thermoplastic resin, pipe joint structure and their manufacturing method
CA 2295836 A1 · Owner: Komada, Hajime · Inventors: Inagaki, Atsushi; Hiraishi, Masanori; Komada, Hajime
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A pneumatic joint (1) comprising a pipe body (2) of a hard thermoplastic resin, and an open ring (3) of a hard thermoplastic resin fitted in the pipe body from one opening thereof; the open ring being provided with a slip-off preventing projection (13) on an outer circumferential surface of a fitted portion thereof; the pipe body (2) being provided with an annular seal (9) of an elastic resin formed firmly on an inner circumferential surface thereof a , fitting inlet-carrying pipe (7) of a hard rigid resin disposed so as to coaxially abut on one opened side portion of the pipe body (2) and having a recess (10), with which the slip-off preventing projection (13) of the open ring (3) …
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 December 24, 1998. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended December 24, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 24, 2020.
- 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.