Drapery actuator system and method of operation
CA 2281063 A1 · Owner: Mao, Kai Ming · Inventors: Mao, Kai Ming
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A drapery opening and closing system for opening and closing a single drape or two, drapes, and a method of opening and closing a drape. A reversible electric motor, to which a, winch member is rotalably coupled is affixed to a wall proximate a window at an approximate, mid-vertical height of such window. An elongate cord having a first end fixed to the wall and, another coupled to such winch member encircles the drape. Upon actuate of the motor, adjustible timing means permits operation of the motor for a predetermined interval of time to, allow the elongate cord to be wound onto such winch member thereby causing , the cord, encircling the drape to constrict and thereby bunching the …
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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 August 24, 1999. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended August 24, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 24, 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.