Refrigerant hose
CA 2337610 A1 · Owner: Aeroquip Corporation · Inventors: Campbell, Scott P.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
This device is a hose for air conditioning purposes that is a barrier hose. The hose comprises an innermost tube (1) of a thermoplastic vulcanizate. The innermost tube of thermoplastic vulcanizate is coextruded with a flexible polyamide barrier material as a second tube (5). A backing (2) of thermoset rubber is extruded or calendared over the polyamide barrier tube. A reinforcement layer (4) follows which is then covered with an EPDM outer cover (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 April 13, 1999. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended April 13, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 13, 2021.
- 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.