Heat resistant breathable films
CA 1324476 C · Owner: Cryovac, Inc. · Inventors: Mueller, Walter Berndt
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A multilayer laminate comprises a first perforated film of propylene homopolymer or copolymer oriented heat set, polyester or oriented heat set polyamide and a second film bonded to the first film and including a bonding layer of ethylene vinyl acetate copolymer or chemically modified ethylene unsaturated ester copolymer, a core layer of a heat resistant, breathable polymeric material and an outer heat, sealable layer. One or more filler layers may be included in the structure, located between the outer heat sealable layer and a polymeric adhesive layer.
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 November 23, 1993. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended November 23, 2010.
- 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.