Microwave curing system
CA 2022945 A1 · Owner: Macmillan Bloedel Limited · Inventors: Churchland, Mark T.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A system for the simultaneous application of pressure and microwaves to a thick mat of curable assemblies. As the curable assemblies are conveyed through a belt press microwaves are applied, to them through an adjacent rapidly expanding applicator horn. A, microwave-transparent ceramic dam or window across the outlet of the horn blocks the compressed assemblies from entering the horn. To minimize any heat cracking of the window it is formed of a number of pieces. These pieces are held in place at the horn outlet by fins secured within the horn and protruding into the window. The fins extend across the interior of the horn and divide it into a number of different microwave paths. The ceramic …
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 August 8, 1990. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended August 8, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 8, 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.