Roller blind
CA 2254864 A1 · Owner: Pfeufer, Lothar · Inventors: Pfeufer, Lothar
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention refers to the joints of the roller blindroller grille-, roller shutter profiles which increase the safety standard of roller blinds because of their specific shape and therefore operate without additional locking device. According belonging to the invention the cross sections of the joints show a spiral shape with a specific curvature belonging to the invention. Therefore the spiral shape is created by the design of the inside bends and outside bends of each analysed spiral part which enclose with certain opening widths the respective joint capsules of the profiles. Because of the specific spiral of the core- and link profiles which are liked with each other and because of the …
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 December 1, 1998. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended December 1, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 1, 2020.
- 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.