Press again to cancel
CA 2332727 A1 · Owner: Gray, Stewart Michael · Inventors: Gray, Stewart Michael
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A logic control system which sends information to the hall and car call controllers of elevator, systems, to cancel the call assignments by a simple means of "pressing the button again to, cancel". In addition, car call assignments shall be cleared when the logic control system does not, meet the following two criteria: an assignment from within the elevator car is accompanied, simultaneously and continuously by the detection of a person within the car. Such a system will, provide the user with more of a choice and seeks to virtually eliminate false calls. The ability to, cancel a call will ultimately save energy.
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 January 25, 2001. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended January 25, 2021.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 25, 2023.
- 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.