Lighting fixture
CA 2361839 A1 · Owner: Wen-Chung, Frank Tsao · Inventors: Wen-Chung, Frank Tsao
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A night lighting fixture comprising a junction box including at least one front plate, within said junction box an electrical light source and light reflector said , fixture including, a visible light detecting photocell a first opening in said front plate for allowing external, ambient light to reach said photocell said photocell and light source being in electrical, communication whereby said photocell is adapted to turn said light source off when the, photocell detects ambient light and on when the photocell does not detect ambient light, and another opening in said front plate to allow for the passage of light from said, electrical light source to provide illumination in the …
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 November 13, 2001. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended November 13, 2021.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 13, 2023.
- 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.