Element row for slide fastener and method and apparatus for producing the element row and monofilament made of synthetic resin for forming the element row
CA 2272156 C · Owner: Matsuda, Yoshio · Inventors: Matsuda, Yoshio
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention provides a element row for a slide fastener obtained by stamping a monofilament made of synthetic resin wherein coupling heads are shaped into peculiar coupling configurations so as to enable the elements to be reliably coupled with each other even if gaps between upper and lower leg portions are small and the element is durable and has a sufficient coupling function and provides a method and an apparatus for producing the element. Each coupling head of a continuous element row (ER) molded by stamping has flat sectional portions each extending from center portions of one ends of the upper and lower leg portions toward each other with widths increasing in an …
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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 18, 1999 and granted March 5, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended May 18, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 18, 2021.
- 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.