Drip irrigation hose and method of its manufacture
CA 2239153 C · Owner: T-Systems International, Inc. · Inventors: Shirvan, Shawn; Defrank, Michael; Hackman, Wayne
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The serpentine, turbulence inducing path lengths (30) from the inlets (26) to the outlets (28) of the flow regulating passage (22) of a continuous emitter drip irrigation hose are arranged in back to back fashion relative to the outlets in the sense that the chevrons angle away from each of outlets so , there is parallel turbulent flow from two inlets to each outlet. The inlets are sufficiently large that they do not limit the flow rate through the outlets. This doubles the flow rate from each outlet without changing the dimensions of the flow regulating passage.
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 November 29, 1995 and granted October 29, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended November 29, 2015.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 29, 2017.
- 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.