An improved duct and method of construction
CA 2380885 A1 · Owner: Talana Investments Limited · Inventors: Donnelly, William James
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A flexible duct construction and method of manufacture is provided in which the duct is formed from a continuously wound elongate member comprising a core of, insulating material, a reinforcing wire element and a casing comprising a strip of, substrate material extending around the core and the reinforcing element. In the, preferred method of manufacture, adhesive is applied to one side of the strip of, substrate, the casing has a tail part extending from a generally circular part which, encapsulates the core and the reinforcing element and the elongate , encapsulated, insulating member is wound helically so that the circular part of one winding overlies, and adheres to the tail part …
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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 5, 2002. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended April 5, 2022.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 5, 2024.
- 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.