Chain stopper
CA 2527182 C · Owner: Hunter Douglas Industries B.V. · Inventors: Koop, Lars
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A chain stopper is provided for attachment to a ball chain having a plurality of balls which are spaced apart along the length of the chain and are interconnected by a plurality of intermediate chain members that extend along the length of the chain between adjacent balls; the stopper being adapted to be attached to the chain between two adjacent balls about an intermediate chain member between the two adjacent balls and being characterized by a maximum cross-sectional size that is equal to or less than the size of the maximum cross-section of the balls of the chain. This stopper is less visible and can slide through a cord weight along with the ball chain to which it is attached.
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 November 16, 2005 and granted April 22, 2014. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended November 16, 2025.
- Certificates of supplementary protection extend only drug patents, and it isn't classified as one.
- 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.