Composite glazing panel
CA 2008787 C · Owner: Lieffrig, Vincent · Inventors: De Clerck, Georges; Lieffrig, Vincent; De Moncuit, Frederic
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A glazing panel consists of or includes a pane 10 comprising a pair of vitreous sheets 1, 2 adherent to an intervening layer of polymeric material 3. The, intervening layer of polymeric material has viscoelastic properties such that the, critical frequency of coincidence (or the lower or lowest critical frequency of, coincidence if there is more than one) of the pane 10 "the coincidence frequency, (~p) of the pane" is greater than the critical frequency of coincidence of a notional monolithic vitreous sheet "the coincidence frequency (~m) of the equivalent monolith" which monolithic sheet is of the same shape and area as the, pane and has a mass equal to the total mass of vitreous …
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 January 29, 1990 and granted March 19, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended January 29, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 29, 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.