Microwaveable packaging compositions
CA 2045708 A1 · Owner: Ici Americas Inc. · Inventors: Wilen, Allan S.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
WS 35756, ABSTRACT, "MICROWAVEABLE PACKAGING COMPOSITIONS" Microwaveable packing compositions exhibiting improved temperature control are provided. These compositions comprise a dielectric substrate having at least a portion of at least one of its surfaces coated with a matrix composition containing susceptor particles as well as particles of a blocking agent selected from the group consisting of calcium salts zinc salts, zinc oxide, lithopone, silica and titanium dioxide. Also disclosed is a microwaveable ink composition useful for the preparation of such packaging compositions as well as a process for manufacturing such packaging compositions.
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 June 26, 1991. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended June 26, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 26, 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.