Concrete reinforcing steel fibers and a method of manufacturing the same
CA 1280559 C · Owner: Kabushiki Kaisha Kobe Seiko Sho · Inventors: Kamei, Kazuo; Takata, Susumu; Tani, Yoshio
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A concrete reinforcing steel fiber has an alternate arrangement of basic portions corresponding to the body of the steel fiber material and section-shaped portions forced by pressing the steel fiber material between a grooved forming roller and a toothed forcing roller. Each section-shaped portion has a flat upper surface lateral projections, and a round bottom. The pressure bearing area b of the section-shaped portion, namely, the sum of the cross-sectional area of the lateral projections and the area of the end surface of the basic portion contiguous with the section-shaped portion is in the range of 0.2A to, 0.5A (A = cross-sectional area of the basic portion). The total pressure bearing …
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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
- Granted February 26, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended February 26, 2008.
- 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.