Tubular skylight with offset dome
CA 2266862 C · Owner: Odl, Incorporated · Inventors: Sitzema, Ronald L. Jr.; Deblock, David A.; Robinson, Joel E.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A tubular skylight having an improved dome improving the efficiency of the skylight and reducing the shadows cast by the skylight. The dome includes a substantially, vertical rear face having an integral prism in a portion of its outer surface and the rear face is, offset inwardly from the perimeter of the reflective tube thus allowing light , to escape from the bottom edge of the rear face downwardly into the reflective tube. The integral prism does not, extend to the top or front face of the dome thus reducing the prevalence of , shadows created by light rays entering the dome through the prism.
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 April 9, 1999 and granted November 12, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended April 9, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 9, 2021.
- 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.