Window bag and method for making a window bag
CA 2445570 A1 · Owner: Johnson, David G. · Inventors: Johnson, David G.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A multi-purpose window bag having multiple layers includes a window an, outer surface and an inner surface. The bag is formed from a multi-ply blank having, an interior polymeric layer and one or more outer layers. The outer layers are typically formed from paper or paper like material and have a window cut through the, outer layers. First, the outer layers are adhered to one another and then the window is, cut through the adhered outer layers. Next a skip laminator is used to apply , adhesive to the interior surface of the adhered outer layers except for the window. , Finally, the, polymeric interior layer is adhered to the outer layers. Preferably the , interior layer is, transparent …
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 October 17, 2003. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended October 17, 2023.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 17, 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.