Doorstop
CA 2105601 C · Owner: Common-Sense Industries, Inc. · Inventors: Wigley, Charles L. Sr.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A doorstop including an elongated shaft slidably and rotatably received within a receptacle seated in a floor proximal a door. The shaft extends vertically from the receptacle and has a cross-member integrally connected thereto and extending therefrom in opposing lateral directions such that the door, when opened toward the shaft will contact the cross-member and rotate the cross-member into planar contact with the door. Thus the movement of, the door will be limited by the shaft and laterally extending cross-member. In a separate embodiment end portions are integrally, connected to the cross-member which project generally horizontally therefrom. When the end portions are facing or …
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 September 7, 1993 and granted September 22, 1998. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended September 7, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 7, 2015.
- 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.