Polyethylene pipe junction device
CA 2091697 A1 · Owner: Charlson, Norman E. · Inventors: Dallai, Giancarlo; Charlson, Gregory D.; Charlson, Norman E.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A pipe junction device is disclosed for mounting on an exterior surface of a resilient pipe such, as polyethylene pipe. The pipe junction device includes a generally cylindrical sleeve member having an inner surface including at least one barb, preferably two projecting inwardly and extending circumferentially around the inner surface. The inner diameter of the sleeve at the barbs is less than a diameter of the exterior surface of said pipe in the uncompressed state. The sleeve slidably receives the pipe wherein the resilient properties of the pipe expand the exterior surface of the pipe in the regions adjacent the region at the barbs to define diameters greater than the diameter of the …
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 March 15, 1993. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended March 15, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 15, 2015.
- 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.