Pressure relief valve for a flexible pouch
CA 2500924 A1 · Owner: Jamison, Mark D. · Inventors: Jamison, Mark D.
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 pressure relief valve (10) for a flexible pouch (12) which is integrated directly into the flexible pouch material. The valve permits excess of gas to dissipate through the valve mechanism but does not permit the reentry of air (hence oxygen) which maintains the food product fresh. The valve is integrated into the pouch material without implanting a fitment. The nature of the valve design results in the closing of the channels of the valve when gas is not discharging through the valve. A secondary purpose of the valve is to maintain the pressure in the pouch below an amount that can bloat the pouch to the extent that the seals can rupture and permit …
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 September 29, 2003. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended September 29, 2023.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 29, 2025.
- 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.