Barrier sealed packages for cigarettes and other smoking articles
CA 1293435 C · Owner: Koschak, Matthew S. · Inventors: Langley, William H.; Yeatts, Roy E.; Koschak, Matthew S.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Abstract of the Disclosure The invention is directed to a packaging composite for barrier sealed cigarette or other smoking article packages. The composite includes a foil layer exterior and interior skin layers of heat-sealable thermoplastic polymer, first and second biaxially oriented polypropylene homopolymer layers located between the exterior skin layers and the foil layers and first and second adhesive layers coupling the polypropylene layers to the foil layer on each side thereof. The package laminate has a thickness of between 1.5 and 2.5 mils.
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 December 24, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended December 24, 2008.
- 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.