Roller screen
CA 2287670 A1 · Owner: Hamstra-Weesp B.V. · Inventors: Schaap, Henk
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A roller screen includes a gauze screen a roll-up, mechanism for said gauze screen a pull beam connected to the, free end of said gauze screen guides for guiding said pull, beam and the side edges of said gauze screen. Furthermore spring hooks are used which cooperate with cams present on the ends of said pull beam, which spring hooks are mounted in the ends of said guides remote from said roll-up mechanism by means of a respective base which fits in the end of a guide. The spring hooks extend substantially in the longitudinal direction of the guides. The spring force of the hooks can be adjusted by means of an adjusting screw mounted in the base which extends, substantially perpendicularly …
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 October 28, 1999. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended October 28, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 28, 2021.
- 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.