Pipe coupling for plastic pipes
CA 2358994 A1 · Owner: Carlstroem, Borge · Inventors: Carlstroem, Borge
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention relates to a pipe coupling for plastic pipes which comprises a glass-fiber reinforced plastic sleeve (2) and a membrane (4) which is produced from an elastic material. Said membrane is configured as a seal on at least one side and is provided with a jointing sleeve (8). In that portion of the membrane where it is configured as a seal a short section (14) is shaped , cylindrically at the margin of the membrane where the tube (20) is inserted (that is at the outer end of the membrane). In said cylindrical part the membrane has a constant wall thickness on which the glass-fiber reinforced sleeve part of the pipe coupling comes to rest.
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 January 19, 2000. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended January 19, 2020.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 19, 2022.
- 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.