A lifting curtain door
CA 2017145 C · Owner: Nergeco Sa · Inventors: Kraeutler, Bernard
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A lifting curtain door comprising a frame constituted by two vertical side uprights interconnected at their top ends by a crass member, the side uprights each constituting or including a slideway, each slideway having a guide wall on either side of the plane of the curtain which curtain may be, gathered together at the top of the door by being rolled up or folded, the curtain being reinforced by horizontal bars whose ends slide in the slideways. At least one of the bars has sufficient flexibility at at least one portion of its length to enable it to escape from at least one of the slideways in the event of an abnormal transverse force being applied to the bar without the bar being deformed …
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 May 18, 1990 and granted January 18, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended May 18, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 18, 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.