Flexible and safe tubing and hoses for connecting indoor and outdoor gaseous fuels (such as natural gas (ng) and lpg) for domestic and industrial applications
CA 2303472 A1 · Owner: Hoffman, Richard E. · Inventors: Jackson, Terry L.; Hoffman, Richard E.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Flexible non-reactive tubing and hoses are disclosed for an economically viable, and, convenient method for conveying natural gas Liquefied Petroleum Gas (LPG) and , other gaseous higher hydrocarbons. The disclosed product is a four component assembly in, which the fuel conveying circular tubing is composed of at least two layers of thermoplastic materials, with the inner surface adapted for exposure to Gaseous Fuel and, composed of co-polyester elastomer. The second layer is a coaxial layer made of a, special nitrite rubber modified PVC compound which is co-extruded over the innermost, layer. The flexible, leakage and permeation free thermoplastic tubing thus , formed is, encapsulated …
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 29, 2000. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended March 29, 2020.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 29, 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.