Window shade assembly
CA 1112149 A · Owner: Newell Companies, Inc. · Inventors: Shewman, C. Reed; Ferguson, Thomas A.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A window shade apparatus which may be customized to a selected width within a predetermined range by the ultimate user without the use of tools at the point of use which, includes a two-piece telescopically adjustable shade roller and a sheet of flexible, web like shade material the width, of which can be substantially conformed to the adjusted length of the shade roller, by separating a marginal side portion of the shade material from the balance of the shade material, along a selected one of a plurality of pre-cut lines of weakness, the lines of weakness being relatively imperceptible by the unaided human eye when viewed at a reasonable distance. A bottom window shade slat assembly …
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
- Granted November 10, 1981. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended November 10, 1998.
- 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.