Method of finishing door and window openings
CA 2119902 C · Owner: The Sloping Edge Inc. · Inventors: Thomas, Godfrey
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method of finishing window cavities is described. This includes the step of flaring peripheral surfaces which define a window opening outwardly from an exterior wall toward an interior wall. Window cavities finished in accordance with the teachings of this method create a sensation of spaciousness of light.
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 18, 1994 and granted June 10, 1997. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended March 18, 2014.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 18, 2016.
- 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.