Cellular shade
CA 2181112 C · Owner: Kirsch Inc. · Inventors: Bertva, Don Lee; Kennedy, James Murrell; Ford, James Arthur
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A cellular pleated shade material is provided for cellular pleated shades. Each pleat thereof is formed from a single strip of shade material which is folded longitudinally in half and, the edges thereof are glued together to form a fin. The side of one cell is affixed to the side of the next adjacent cell adjacent the centerline of the sides. The ratio of cell height to cell width may be varied, without affecting the overall aesthetic presentation of the shade by varying the, size of the fin.
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 July 12, 1996 and granted September 14, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended July 12, 2016.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 12, 2018.
- 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.