Sheet material
CA 1191775 A · Owner: Gatward, Douglas K. · Inventors: Gatward, Douglas K.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A laminated wrapping sheet material comprising a layer of paper bonded to a layer of plastics film is formed such that a layer, of paper of 15 - 35 gsm gauge is discontinuously bonded to a layer of plastics film of 8 - 35 microns such that pockets of air are defined between the layers. The sheet material is useful in the construction of a captive flap bag formed of a paper-plastics film laminate and comprising two superimposed walls with plastics film on the inside closed at the bottom and on each of the two side edges and open at, the top edge, at least one wall having a reflex internal flap along the top edge sealed at each of the side edges to define an internal, inverted pocket the two …
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
- Granted August 13, 1985. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended August 13, 2002.
- 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.