Multiwall bag
CA 2128261 C · Owner: Bluegrass/Cvi Packaging Company, Llc · Inventors: Allerby, Ian M.; Grace, Stephen J.; Brown, Eric J.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A container apparatus and method of manufacture for same in which the container includes an inner tube formed of plastics material and an outer tube of one of more plies of material. The container is generally configured to lie flat when in its unfilled condition. The container has a flat first end formed from flap members configured from one or more plies of the outer tube. The container is advantageously configured to enable open- ing of the first end of the outer tube to provide access to the inner tube.
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 July 18, 1994 and granted September 17, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended July 18, 2014.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 18, 2016.
- 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.