Pc strand coated with rust inhibitor and method for producing the same
CA 2136557 A1 · Owner: Times Engineering, Ltd. · Inventors: Muguruma, Hiroshi; Chikiri, Kazuyoshi; Higashi, Yukihiro
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A PC strand is formed by twisting peripheral wires made of deformed PC steel wires around a core and, allowing rust inhibitive material of thermoplastic resin to permeate into voids defined among the core and peripheral wires by use of an extruder. Since at least one of the core and peripheral wires is made of a deformed PC steel wire having an uneven outer surface the, thermoplastic resin can smoothly permeate deep into the inside of the PC strand.
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 November 24, 1994. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended November 24, 2014.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 24, 2016.
- 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.