Canadian application, no grantCanada
Measurement of the horizontal deviation of an elevator car vertical hoistway rail
CA 2063057 A1 · Owner: Otis Elevator Company · Inventors: Roberts, Randall K.
Overview
Drawings and full text
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An elevator hoistway rail profile is made by summing a doubly integrated car horizontal acceleration signal with a relative rail-car displacement signal and storing the summed signal according to the vertical position of the car in the hoistway.
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 March 13, 1992. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended March 13, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 13, 2014.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledMarch 13, 1992
GrantedNo grant recorded
Term endedMarch 13, 2012
Patent numberCA 2063057 A1
Classification (IPC)B66B1/00 +2 more
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.