Multi-layer sandwich sheet and packaging using the said sheet
CA 1306175 C · Owner: Holzner, Gunter · Inventors: Holzner, Gunter
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Case 3440, Multi-layer sandwich sheet and packaging using the said sheet ABSTRACT, Multi-layer laminated sandwich sheet comprising at least two layers which, are superimposed and stuck together by welding or gluing one of which being, constituted by a material impervious to the active volatile agents of a perfuming or deodorizing composition, of an aroma or of an insecticidal or bactericidal substance, and the other being composed of a film made from a polymer or a copolymer with a polyolefin base or from a copolymer of polyamide and polyether,which film contains in dispersed and homogeneous phase, a base constituted by aperfuming or deodorizing composition an aroma or an insecticidal or …
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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 11, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended August 11, 2009.
- 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.