Hot rolled steel wire rod, fine steel wire and twisted steel wire, and manufacture of the fine steel wire
CA 2103111 C · Owner: Minamida, Takaaki · Inventors: Katsube, Kozo; Shohzaki, Tamotsu; Oki, Yasuhiro
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Disclosed are a steel wire rod for manufacturing a fine steel wire excellent in drawability strength and toughness in which the contents of components such as C Si, Mn, P, S, Al, Cu are specified, the contents of one or more of elements selected from a group consisting of Cr W, Ni and Mo are also specified, and in which the balance is essentially Fe and inevitable impurities and for which the composition of non-metallic inclusions of oxides is also specified; a fine steel wire obtained by drawing of the steel wire rod; and a twisted wire cord made by twisting of the fine steel wires. Further disclosed is a die schedule for manufacturing the above fine steel wire. Thus there can be provided …
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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 November 15, 1993 and granted April 10, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended November 15, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 15, 2015.
- 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.