Gas barrier packaging material
CA 1058501 A · Owner: Scholle Corporation · Inventors: Scholle, William R.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Multiple ply packaging materials formed of certain polymer films each having a gas permeability of 10 or less cc per 100 square inches per mil thickness over a 24 hour period at one atmosphere pressure and 73°F. and 50% R.H. such as polyvinylidene chloride exhibit unexpectedly high, gas barrier properties in comparison with a single film of the same equivalent thickness.
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 July 17, 1979. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended July 17, 1996.
- 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.