Mineral insulated cable manufacture
CA 2040193 C · Owner: Bicc General Pyrotenax Cables Limited · Inventors: Simester, Ronald Alexander
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
In the continuous manufacture of m.i. cable in which the sheathed tube is formed by welding the longitudinally extending edges of a transversely folded copper strip, a preformed body of a fluid-permeable ceramic or sintered heat-resistant material is disposed on the outer surface of the powder delivery tube radially inwardly of the advancing strip in the vicinity of the welding station. Argon or other inert gas fed into the fluid-permeable preformed body from at least one pipe is caused to flow radially outwardly through the preformed body to provide an environment of argon or other inert gas between the preformed body and the copper tube in the vicinity of the welding station.
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 10, 1991 and granted April 30, 1996. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended April 10, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 10, 2013.
- 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.