Siloxane polymers and copolymers as barrier coatings and method of producing barrier coating properties therewith
CA 2032215 A1 · Owner: Energy Sciences Inc. · Inventors: Wyman, John E.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method of imubing polymer films as of polyethylene and polypropylene with gas, aroma, fragrance flavor, grease and oil impermeable surface characteristics involving coating the film with appropriate silane compounds and cross-linking the same while providing physical adsorption adherence to the film, and in sufficient coating micron thickness to produce gas and related barrier characteristics; with chemical grafting, including by eb techniques further providing improved bonding. Preferred barriercoated polymer films with reduced haze and clarity are formed by such method. The method is also useful to increase the barrier properties of organo-polymer films that already possess initial …
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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
- Filed December 13, 1990. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended December 13, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 13, 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.