Method of and apparatus for metering an elongate stringer chain
CA 2023137 C · Owner: Horita, Yoshiyuki · Inventors: Horita, Yoshiyuki; Matsuda, Yasuhiko
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method of and an apparatus for metering an elongate stringer chain to be finished into slide fasteners of different lengths, the metering being based on an element pitch P derived from dividing a given metering length L by the number of coupling elements thereon. The stringer chain is held substantially in tensionless suspension while it is being metered to achieve a maximum of metering accuracy.
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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 August 10, 1990 and granted July 23, 1996. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended August 10, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 10, 2012.
- 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
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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.