Venetian blind with the capability of regulating its length and width
CA 2025441 A1 · Owner: Hsu, Chi-Hsien · Inventors: Hsu, Chi-Hsien
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention relates to a venetian blind used to regulate the intensity of indoor light and to shade the sun light in living environments, the venetian blind having the capability of being adjusted in length and width. The blind comprises a sky rail and a lower beam which are mutually latched in a tri-sectional mode and have the capability of expanding and contracting, fixing slices at the hole positions of the pulling rope on the lower beam to provide the ladder rope and the pulling rope fixing positions wherein holes of the pulling ropes on both sides of the blind are elongated holes and basic components of known venetian blinds. It is only necessary to cut the extra part of the blind to …
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 September 14, 1990. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended September 14, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 14, 2012.
- 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.