Fireproof lift shaft door
CA 2304332 A1 · Owner: Guillaume, Didier · Inventors: Thillot, Serge; Guillaume, Didier
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
There is created in a modular shaft door system a fireproof lift shaft door (1) predominantly, by flange-mounting, to standard shaft door panels of flat insulating material , housings (30) filled with high-efficiency, novel insulating material layers (31). These insulating material, housings are so constructed that they have throughflow chicanes in the region of the, closing edge and form, in the closed state additional labyrinth-like , obstacles (36) against the passage of flame and gas in co-operation with the door frame. An overall flat mode of, construction of the shaft door (1) enables with minimal loss of usable shaft , cross-sectional area, the doors to be mounted in rational …
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 April 7, 2000. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended April 7, 2020.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 7, 2022.
- 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.