Copper wire and process for making copper wire
CA 2195218 C · Owner: Wiechmann, Rudolf · Inventors: Fedor, Robert J.; Wright, Roger N.; Kohut, Stephen J.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
This invention relates to copper wire having a substantially uniform unoriented grain structure that is essentially columnar grain free. This invention also relates to a process for making copper wire comprising: cutting copper foil to form at least one strand of copper wire said copper foil being , an annealable electrodeposited copper foil having a substantially uniform unoriented grain structure that is essentially columnar grain free said foil , being characterized by a fatigue ductility of at least about 25% after being annealed at 177 ~C for 15 minutes; and shaping said strand of wire to provide said strand with desired cross-sectional shape and size. This invention also …
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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 May 30, 1996 and granted December 14, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended May 30, 2016.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 30, 2018.
- 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.