Cushioned envelope
CA 2489820 A1 · Owner: Kannankeril, Charles · Inventors: Brandolini, Maurizio; Kannankeril, Charles
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An envelope includes a front wall having two lateral edges a top edge, and a , bottom edge; and a rear wall having two lateral edges a top edge, and a , bottom edge, the front and rear walls joined along their respective lateral and bottom edges; wherein the front and rear walls each have an outer ply including an outer layer including a propylene polymer or copolymer polyamide , or copolyamide, or polyester or copolyester and an inner layer including an , ethylene homopolymer or copolymer; and an inner ply including an inner and outer surface, including an air cellular or foamed material; the inner surface of the outer ply being adhered to the outer surface of the inner ply. A closure …
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 June 17, 2003. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended June 17, 2023.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 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.