Improved garage door opener
CA 2449776 A1 · Owner: Pastor, Donald · Inventors: Stephens, Joseph; Powder, Joel; St Pierre, James H.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An improved garage door opener is disclosed. The garage door opener has a housing and a rail. The rail has a first end and a second end said first end , being adapted to be connected to a wall of a structure and the second end being adapted to be connected to the housing. The housing has motor for driving a belt that is connected to a trolley riding along said rail. The trolley is adapted to move the door in response to the motion of the belt. The housing has a sensing means for sensing whether said belt is moving when said motor is operating. The sensor causes the motor to cease if there is no belt motion when the motor is operating.
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 June 5, 2002. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended June 5, 2022.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 5, 2024.
- 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.