Foam in bag packaging system
CA 2250733 C · Owner: Sealed Air Corporation · Inventors: Sperry, Laurence Burst; Davlin, Anthony Orkin
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A foam-in-place packaging system is disclosed that comprises a flexible bag (23) closed on its side edges. A frangible seal (37) defines separate interior cells (41, 42) in the bag. The frangible seal defines an interior cell when the frangible seal is broken. The cells separately contain a first and second foam precursor composition, and the bag may include means for permitting gases to vent from the bag as the foam precursors form foam. As a result when the , frangible seal is broken, the separate cells form an interior cell in which the first and second foam precursors can mix and react properly and permit the resulting foam to expand and flow within the resulting interior cell of …
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 April 1, 1997 and granted October 29, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended April 1, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 1, 2019.
- 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.