Safety windowpanes made of laminated glass, processes for their manufacture
CA 2092267 A1 · Owner: Deprez, Jean-Pierre · Inventors: De La Rochefoucauld, Christian; Deprez, Jean-Pierre
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Safety windowpanes made of laminated glass; processes for their manufacture. A safety windowpane made of laminated glass of, the type comprising two glasses made of annealed hardened or quenched glass 1, 2 bonded to one another by an insert sheet of synthetic material 3 to the opposite faces of which said glasses are adhesively attached in, which said sheet comprises in said material a line 4 of discontinuity in mechanical strength of relatively small width, said line defining an outline of preopening of a surface area such that after breaking of said glasses 1, 2 and rupture along said outline, it offers a sufficient passage for a human body. The invention also relates to processes for the …
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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 March 23, 1993. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended March 23, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 23, 2015.
- 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.