Flexible containers
CA 2078852 C · Owner: Norsk Hydro A.S · Inventors: Strand, Olaf; Martin, Donald Mccallum
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A flexible intermediate bulk container having a liner which is provided with one or more hollow suspension means 122 124 for fastening the liner to an outer container in correct relative position. The suspension means 122 124, form vents for expellation of air from the liner during and subsequent to filling with particulate bulk material. The suspension means are preferably tubular to provide vents for the interior of the liner, these vents may be controlled by a one-way valve device.
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 22, 1992 and granted March 18, 1997. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended September 22, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 22, 2014.
- 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.