Coupling element for slide fastener
CA 2005213 C · Owner: Ykk Corporation · Inventors: Fukuroi, Takeo
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A coupling element for slide fastener is formed from a monofilamentary material such as polyester nylon and like, thermoplastic resins into a continuous meandering or zig-zag structure having a substantially semi-circular transverse cross-section, the coupling element having a coupling head an upper leg and a lower leg extending oppositely from said head in parallel spaced apart relation and a heel interconnecting each of the upper and lower legs. The heel is oriented by rotation through 90° or 180° and protrudes at least in part beyond the outer surface of the leg thereby providing increased surface area of the heel for sliding contact with a slider.
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 December 12, 1989 and granted November 1, 1994. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended December 12, 2009.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 12, 2011.
- 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.