Transparent barrier film and method
CA 2015308 C · Owner: Flex Products, Inc. · Inventors: Coombs, Paul G.; Phillips, Roger W.; Wendt, Lauren R.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A substantially transparent barrier film comprising a flexible substantially transparent substrate having first and second surfaces. A substantially colorless barrier coating is formed on at least one of said surfaces of a carbon-like material having a thickness ranging from 50 to 300 Angstroms.
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 April 24, 1990 and granted December 7, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended April 24, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 24, 2012.
- 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.