Doorstop
CA 2048637 A1 · Owner: Lunn, Lawrence M. · Inventors: Lunn, Lawrence M.; Lunn, Lawrence M.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A resilient doorstop may be inexpensively manufactured to provide a door-engaging portion (10) and a base portion (20) interconnected with two or more serially connect long, straight lengths of , rod (32, 33) laying transverse to the door-engaging portion and having a length sufficient that the door-engaging portion may be substantially deformed in the direction of the base portion without exceeding the elastic limit of the rod. The resilient doorstop is preferably formed from a single, resilient bent rod and, includes a U-shaped portion (31) with a central axis laying transverse to the central axis of the door-engaging portion to provide one or more long straight lengths of rod, …
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 February 23, 1990. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended February 23, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 23, 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.