Heat insulating vacuum panel
CA 2125065 A1 · Owner: Bayer Aktiengesellschaft · Inventors: Lamberts, Wilhelm; Welte, Rainer; Dietrich, Karl Werner
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A heat insulating vacuum panel consists of a) an open-cell rigid synthetic foam material which is obtained through impregnation of an open-cell synthetic foam material with polyisocyanates and subsequent curing and, b) a film sheet covering the rigid synthetic foam material. The film sheet that contains the foam material is evacuated and hermetically sealed.
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 3, 1994. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended June 3, 2014.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 3, 2016.
- 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.