Metallized polypropylene film and process for manufacture
CA 2053767 A1 · Owner: Theisen, Henry · Inventors: Nelson, Kevin; Theisen, Henry
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Abstract of the Disclosure, This invention relates to a metallized polypropylene film made from polypropylene/acid terpolymer blends and the process for the manufacture thereof. The acid terpolymer is composed of an ester monomer, an acid monomer and ethylene.
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
- Filed October 22, 1991. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended October 22, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 22, 2013.
- 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.