Bidirectional or two-way air and gas flow control device for product packaging and a method therefor
CA 2003892 A1 · Owner: Vacu-O-Leader International S.A.L. · Inventors: Larose, Gilles
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention relates to a bidirectional or two-way air and gas flow control device for product packaging into a container and more particularly, relates to a bidirectional flow control device for packaging any product such as food or industrial materials. The control device comprises a first member adapted to be affixed to the wall of the container and a second member for engaging and closing the first member. The flow control device can be used in a monodirectional manner, that is, the air is simply withdrawn from the container, so as to package the product in vacuum or simply, to reduce the volume of the package for storage purposes. Alternatively the flow control device is used …
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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 November 24, 1989. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended November 24, 2009.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 24, 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.