Self-closing fire rated floor door
CA 2349648 C · Owner: Beck, Jerome E. · Inventors: Beck, Jerome E.; Wise, David R.; Craig, Alfred G.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
This invention relates to a novel self-closing fire rated floor door. More particularly this invention pertains to a novel floor door which uses fusible plugs and compressed gas cylinders for automatically closing the floor door when ambient temperature rises above a predetermined temperature due to a fire. A self- closing fire rated floor door assembly comprising: (a) a fire rated frame with an opening therethrough; (b) a fire rated door hingedly connected to the frame and cooperating with the opening; (c) a fluid cylinder which is pivotally connected to the frame and the door the cylinder when pressurized with fluid opening the door relative to the frame and when depressurized, closing …
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 1, 2001 and granted September 23, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended June 1, 2021.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 1, 2023.
- 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.