Insulating glass pane
CA 2006522 A1 · Owner: Lenhardt, Karl · Inventors: Lenhardt, Karl
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The insulating glass pane consists of two individual panes of glass that are connected by means of a plastic stand-off frame which incorporates two layers of different composition of which the inner layer defines the interior space between the panes and is formed by a hardened adhesive that contains a substance that absorbs water vapour, and of which the outer layer consists of a hardened adhesive that is different from the adhesive that forms the inner layer.
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 December 22, 1989. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended December 22, 2009.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 22, 2011.
- 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.